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Finding the Fourth Proportional to 72,606,868.20, 108,910,302.30 and 72,181,715.40

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Solution

The fourth proportional to 72,606,868.20, 108,910,302.30 and 72,181,715.40 is: 108,272,573.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,606,868.20 : 108,910,302.30 = 72,181,715.40 : x
  2. Step 2: Convert to fraction form
    72,606,868.20/108,910,302.30 = 72,181,715.40/x
  3. Step 3: Cross multiply
    72,606,868.20x = 108,910,302.30 × 72,181,715.40
  4. Step 4: Simplify right side
    72,606,868.20x = 7,861,332,444,746,566
  5. Step 5: Solve for x
    x = 7,861,332,444,746,566/72,606,868.20
  6. Step 6: Final answer
    x = 108,272,573.10

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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.