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Finding the Fourth Proportional to 140.30, 209.32 and 124.91

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Solution

The fourth proportional to 140.30, 209.32 and 124.91 is: 186.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    140.30 : 209.32 = 124.91 : x
  2. Step 2: Convert to fraction form
    140.30/209.32 = 124.91/x
  3. Step 3: Cross multiply
    140.30x = 209.32 × 124.91
  4. Step 4: Simplify right side
    140.30x = 26,145.59
  5. Step 5: Solve for x
    x = 26,145.59/140.30
  6. Step 6: Final answer
    x = 186.36

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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.