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Finding the Fourth Proportional to 60,428,772.60, 90,643,158.90 and 20,034,007.80

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Solution

The fourth proportional to 60,428,772.60, 90,643,158.90 and 20,034,007.80 is: 30,051,011.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,428,772.60 : 90,643,158.90 = 20,034,007.80 : x
  2. Step 2: Convert to fraction form
    60,428,772.60/90,643,158.90 = 20,034,007.80/x
  3. Step 3: Cross multiply
    60,428,772.60x = 90,643,158.90 × 20,034,007.80
  4. Step 4: Simplify right side
    60,428,772.60x = 1,815,945,752,419,239.50
  5. Step 5: Solve for x
    x = 1,815,945,752,419,239.50/60,428,772.60
  6. Step 6: Final answer
    x = 30,051,011.70

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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.