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Finding the Fourth Proportional to 85,363,736.90, 128,045,605.35 and 85,363,736.90

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Solution

The fourth proportional to 85,363,736.90, 128,045,605.35 and 85,363,736.90 is: 128,045,605.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,363,736.90 : 128,045,605.35 = 85,363,736.90 : x
  2. Step 2: Convert to fraction form
    85,363,736.90/128,045,605.35 = 85,363,736.90/x
  3. Step 3: Cross multiply
    85,363,736.90x = 128,045,605.35 × 85,363,736.90
  4. Step 4: Simplify right side
    85,363,736.90x = 10,930,451,366,298,632
  5. Step 5: Solve for x
    x = 10,930,451,366,298,632/85,363,736.90
  6. Step 6: Final answer
    x = 128,045,605.35

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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.