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Finding the Fourth Proportional to 71,972,275.20, 107,958,412.80 and 65,029,862.40

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Solution

The fourth proportional to 71,972,275.20, 107,958,412.80 and 65,029,862.40 is: 97,544,793.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,972,275.20 : 107,958,412.80 = 65,029,862.40 : x
  2. Step 2: Convert to fraction form
    71,972,275.20/107,958,412.80 = 65,029,862.40/x
  3. Step 3: Cross multiply
    71,972,275.20x = 107,958,412.80 × 65,029,862.40
  4. Step 4: Simplify right side
    71,972,275.20x = 7,020,520,729,306,398
  5. Step 5: Solve for x
    x = 7,020,520,729,306,398/71,972,275.20
  6. Step 6: Final answer
    x = 97,544,793.60

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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.