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Finding the Fourth Proportional to 100,691.46, 138,982.23 and 57,695.04

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Solution

The fourth proportional to 100,691.46, 138,982.23 and 57,695.04 is: 79,635.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,691.46 : 138,982.23 = 57,695.04 : x
  2. Step 2: Convert to fraction form
    100,691.46/138,982.23 = 57,695.04/x
  3. Step 3: Cross multiply
    100,691.46x = 138,982.23 × 57,695.04
  4. Step 4: Simplify right side
    100,691.46x = 8,018,585,319.14
  5. Step 5: Solve for x
    x = 8,018,585,319.14/100,691.46
  6. Step 6: Final answer
    x = 79,635.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.