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Finding the Fourth Proportional to 99,910.70, 149,793.15 and 40,715.90

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Solution

The fourth proportional to 99,910.70, 149,793.15 and 40,715.90 is: 61,044.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,910.70 : 149,793.15 = 40,715.90 : x
  2. Step 2: Convert to fraction form
    99,910.70/149,793.15 = 40,715.90/x
  3. Step 3: Cross multiply
    99,910.70x = 149,793.15 × 40,715.90
  4. Step 4: Simplify right side
    99,910.70x = 6,098,962,916.09
  5. Step 5: Solve for x
    x = 6,098,962,916.09/99,910.70
  6. Step 6: Final answer
    x = 61,044.14

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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.