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Finding the Fourth Proportional to 124.97, 172.16 and 101.59

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Solution

The fourth proportional to 124.97, 172.16 and 101.59 is: 139.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.97 : 172.16 = 101.59 : x
  2. Step 2: Convert to fraction form
    124.97/172.16 = 101.59/x
  3. Step 3: Cross multiply
    124.97x = 172.16 × 101.59
  4. Step 4: Simplify right side
    124.97x = 17,489.82
  5. Step 5: Solve for x
    x = 17,489.82/124.97
  6. Step 6: Final answer
    x = 139.95

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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.