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Finding the Fourth Proportional to 72,766,513.80, 109,149,770.70 and 34,502,761.80

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Solution

The fourth proportional to 72,766,513.80, 109,149,770.70 and 34,502,761.80 is: 51,754,142.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,766,513.80 : 109,149,770.70 = 34,502,761.80 : x
  2. Step 2: Convert to fraction form
    72,766,513.80/109,149,770.70 = 34,502,761.80/x
  3. Step 3: Cross multiply
    72,766,513.80x = 109,149,770.70 × 34,502,761.80
  4. Step 4: Simplify right side
    72,766,513.80x = 3,765,968,538,986,719
  5. Step 5: Solve for x
    x = 3,765,968,538,986,719/72,766,513.80
  6. Step 6: Final answer
    x = 51,754,142.70

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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.