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Finding the Fourth Proportional to 68,731.40, 103,037.10 and 26,640.20

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Solution

The fourth proportional to 68,731.40, 103,037.10 and 26,640.20 is: 39,937.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,731.40 : 103,037.10 = 26,640.20 : x
  2. Step 2: Convert to fraction form
    68,731.40/103,037.10 = 26,640.20/x
  3. Step 3: Cross multiply
    68,731.40x = 103,037.10 × 26,640.20
  4. Step 4: Simplify right side
    68,731.40x = 2,744,928,951.42
  5. Step 5: Solve for x
    x = 2,744,928,951.42/68,731.40
  6. Step 6: Final answer
    x = 39,937.04

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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.