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Finding the Fourth Proportional to 124.02, 171.17 and 74.24

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Solution

The fourth proportional to 124.02, 171.17 and 74.24 is: 102.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.02 : 171.17 = 74.24 : x
  2. Step 2: Convert to fraction form
    124.02/171.17 = 74.24/x
  3. Step 3: Cross multiply
    124.02x = 171.17 × 74.24
  4. Step 4: Simplify right side
    124.02x = 12,707.66
  5. Step 5: Solve for x
    x = 12,707.66/124.02
  6. Step 6: Final answer
    x = 102.46

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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.