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Finding the Fourth Proportional to 124.48, 185.70 and 112.87

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Solution

The fourth proportional to 124.48, 185.70 and 112.87 is: 168.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.48 : 185.70 = 112.87 : x
  2. Step 2: Convert to fraction form
    124.48/185.70 = 112.87/x
  3. Step 3: Cross multiply
    124.48x = 185.70 × 112.87
  4. Step 4: Simplify right side
    124.48x = 20,959.96
  5. Step 5: Solve for x
    x = 20,959.96/124.48
  6. Step 6: Final answer
    x = 168.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.