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Finding the Fourth Proportional to 151.53, 209.25 and 102.39

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Solution

The fourth proportional to 151.53, 209.25 and 102.39 is: 141.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.53 : 209.25 = 102.39 : x
  2. Step 2: Convert to fraction form
    151.53/209.25 = 102.39/x
  3. Step 3: Cross multiply
    151.53x = 209.25 × 102.39
  4. Step 4: Simplify right side
    151.53x = 21,425.11
  5. Step 5: Solve for x
    x = 21,425.11/151.53
  6. Step 6: Final answer
    x = 141.39

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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.