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Finding the Fourth Proportional to 72,513,359, 108,773,651 and 20,705,647.20

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Solution

The fourth proportional to 72,513,359, 108,773,651 and 20,705,647.20 is: 31,059,502.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,513,359 : 108,773,651 = 20,705,647.20 : x
  2. Step 2: Convert to fraction form
    72,513,359/108,773,651 = 20,705,647.20/x
  3. Step 3: Cross multiply
    72,513,359x = 108,773,651 × 20,705,647.20
  4. Step 4: Simplify right side
    72,513,359x = 2,252,228,842,261,927
  5. Step 5: Solve for x
    x = 2,252,228,842,261,927/72,513,359
  6. Step 6: Final answer
    x = 31,059,502.32

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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.