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Finding the Fourth Proportional to 85,800,627.70, 128,700,941.55 and 85,800,627.70

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Solution

The fourth proportional to 85,800,627.70, 128,700,941.55 and 85,800,627.70 is: 128,700,941.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,800,627.70 : 128,700,941.55 = 85,800,627.70 : x
  2. Step 2: Convert to fraction form
    85,800,627.70/128,700,941.55 = 85,800,627.70/x
  3. Step 3: Cross multiply
    85,800,627.70x = 128,700,941.55 × 85,800,627.70
  4. Step 4: Simplify right side
    85,800,627.70x = 11,042,621,570,571,012
  5. Step 5: Solve for x
    x = 11,042,621,570,571,012/85,800,627.70
  6. Step 6: Final answer
    x = 128,700,941.55

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.