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Finding the Fourth Proportional to 99,794,891.60, 149,692,337.40 and 72,921,035.60

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Solution

The fourth proportional to 99,794,891.60, 149,692,337.40 and 72,921,035.60 is: 109,381,553.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,794,891.60 : 149,692,337.40 = 72,921,035.60 : x
  2. Step 2: Convert to fraction form
    99,794,891.60/149,692,337.40 = 72,921,035.60/x
  3. Step 3: Cross multiply
    99,794,891.60x = 149,692,337.40 × 72,921,035.60
  4. Step 4: Simplify right side
    99,794,891.60x = 10,915,720,264,592,610
  5. Step 5: Solve for x
    x = 10,915,720,264,592,610/99,794,891.60
  6. Step 6: Final answer
    x = 109,381,553.40

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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.