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Finding the Fourth Proportional to 80,719,657.20, 112,752,428.40 and 80,719,657.20

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Solution

The fourth proportional to 80,719,657.20, 112,752,428.40 and 80,719,657.20 is: 112,752,428.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,719,657.20 : 112,752,428.40 = 80,719,657.20 : x
  2. Step 2: Convert to fraction form
    80,719,657.20/112,752,428.40 = 80,719,657.20/x
  3. Step 3: Cross multiply
    80,719,657.20x = 112,752,428.40 × 80,719,657.20
  4. Step 4: Simplify right side
    80,719,657.20x = 9,101,337,368,915,546
  5. Step 5: Solve for x
    x = 9,101,337,368,915,546/80,719,657.20
  6. Step 6: Final answer
    x = 112,752,428.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.