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Finding the Fourth Proportional to 100.91, 151.37 and 36.79

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Solution

The fourth proportional to 100.91, 151.37 and 36.79 is: 55.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.91 : 151.37 = 36.79 : x
  2. Step 2: Convert to fraction form
    100.91/151.37 = 36.79/x
  3. Step 3: Cross multiply
    100.91x = 151.37 × 36.79
  4. Step 4: Simplify right side
    100.91x = 5,567.96
  5. Step 5: Solve for x
    x = 5,567.96/100.91
  6. Step 6: Final answer
    x = 55.18

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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.