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Finding the Fourth Proportional to 129.79, 177.82 and 124.93

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Solution

The fourth proportional to 129.79, 177.82 and 124.93 is: 171.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.79 : 177.82 = 124.93 : x
  2. Step 2: Convert to fraction form
    129.79/177.82 = 124.93/x
  3. Step 3: Cross multiply
    129.79x = 177.82 × 124.93
  4. Step 4: Simplify right side
    129.79x = 22,215.05
  5. Step 5: Solve for x
    x = 22,215.05/129.79
  6. Step 6: Final answer
    x = 171.16

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.