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Finding the Fourth Proportional to 85,876.55, 128,814.83 and 76,363.10

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Solution

The fourth proportional to 85,876.55, 128,814.83 and 76,363.10 is: 114,544.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,876.55 : 128,814.83 = 76,363.10 : x
  2. Step 2: Convert to fraction form
    85,876.55/128,814.83 = 76,363.10/x
  3. Step 3: Cross multiply
    85,876.55x = 128,814.83 × 76,363.10
  4. Step 4: Simplify right side
    85,876.55x = 9,836,699,362.96
  5. Step 5: Solve for x
    x = 9,836,699,362.96/85,876.55
  6. Step 6: Final answer
    x = 114,544.65

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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.