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Finding the Fourth Proportional to 72,858,734.80, 109,414,073.40 and 38,846,510.80

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Solution

The fourth proportional to 72,858,734.80, 109,414,073.40 and 38,846,510.80 is: 58,336,930.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,858,734.80 : 109,414,073.40 = 38,846,510.80 : x
  2. Step 2: Convert to fraction form
    72,858,734.80/109,414,073.40 = 38,846,510.80/x
  3. Step 3: Cross multiply
    72,858,734.80x = 109,414,073.40 × 38,846,510.80
  4. Step 4: Simplify right side
    72,858,734.80x = 4,250,354,984,005,092.50
  5. Step 5: Solve for x
    x = 4,250,354,984,005,092.50/72,858,734.80
  6. Step 6: Final answer
    x = 58,336,930.99

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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.