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Finding the Fourth Proportional to 124.97, 187.09 and 99.33

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Solution

The fourth proportional to 124.97, 187.09 and 99.33 is: 148.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.97 : 187.09 = 99.33 : x
  2. Step 2: Convert to fraction form
    124.97/187.09 = 99.33/x
  3. Step 3: Cross multiply
    124.97x = 187.09 × 99.33
  4. Step 4: Simplify right side
    124.97x = 18,582.71
  5. Step 5: Solve for x
    x = 18,582.71/124.97
  6. Step 6: Final answer
    x = 148.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.