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Finding the Fourth Proportional to 124.33, 171.39 and 87.37

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Solution

The fourth proportional to 124.33, 171.39 and 87.37 is: 120.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.33 : 171.39 = 87.37 : x
  2. Step 2: Convert to fraction form
    124.33/171.39 = 87.37/x
  3. Step 3: Cross multiply
    124.33x = 171.39 × 87.37
  4. Step 4: Simplify right side
    124.33x = 14,974.34
  5. Step 5: Solve for x
    x = 14,974.34/124.33
  6. Step 6: Final answer
    x = 120.44

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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.