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Finding the Fourth Proportional to 151.61, 209.23 and 93.38

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Solution

The fourth proportional to 151.61, 209.23 and 93.38 is: 128.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.61 : 209.23 = 93.38 : x
  2. Step 2: Convert to fraction form
    151.61/209.23 = 93.38/x
  3. Step 3: Cross multiply
    151.61x = 209.23 × 93.38
  4. Step 4: Simplify right side
    151.61x = 19,536.62
  5. Step 5: Solve for x
    x = 19,536.62/151.61
  6. Step 6: Final answer
    x = 128.87

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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.