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Finding the Fourth Proportional to 40,639.70, 60,910.95 and 20,908.10

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Solution

The fourth proportional to 40,639.70, 60,910.95 and 20,908.10 is: 31,337.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,639.70 : 60,910.95 = 20,908.10 : x
  2. Step 2: Convert to fraction form
    40,639.70/60,910.95 = 20,908.10/x
  3. Step 3: Cross multiply
    40,639.70x = 60,910.95 × 20,908.10
  4. Step 4: Simplify right side
    40,639.70x = 1,273,532,233.70
  5. Step 5: Solve for x
    x = 1,273,532,233.70/40,639.70
  6. Step 6: Final answer
    x = 31,337.15

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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.