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Finding the Fourth Proportional to 124.25, 171.47 and 80.59

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Solution

The fourth proportional to 124.25, 171.47 and 80.59 is: 111.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.25 : 171.47 = 80.59 : x
  2. Step 2: Convert to fraction form
    124.25/171.47 = 80.59/x
  3. Step 3: Cross multiply
    124.25x = 171.47 × 80.59
  4. Step 4: Simplify right side
    124.25x = 13,818.77
  5. Step 5: Solve for x
    x = 13,818.77/124.25
  6. Step 6: Final answer
    x = 111.22

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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.