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Finding the Fourth Proportional to 72,447,127.80, 108,670,691.70 and 65,280,766.20

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Solution

The fourth proportional to 72,447,127.80, 108,670,691.70 and 65,280,766.20 is: 97,921,149.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,447,127.80 : 108,670,691.70 = 65,280,766.20 : x
  2. Step 2: Convert to fraction form
    72,447,127.80/108,670,691.70 = 65,280,766.20/x
  3. Step 3: Cross multiply
    72,447,127.80x = 108,670,691.70 × 65,280,766.20
  4. Step 4: Simplify right side
    72,447,127.80x = 7,094,106,017,659,981
  5. Step 5: Solve for x
    x = 7,094,106,017,659,981/72,447,127.80
  6. Step 6: Final answer
    x = 97,921,149.30

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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.