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Finding the Fourth Proportional to 110.13, 151.88 and 66.43

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Solution

The fourth proportional to 110.13, 151.88 and 66.43 is: 91.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.13 : 151.88 = 66.43 : x
  2. Step 2: Convert to fraction form
    110.13/151.88 = 66.43/x
  3. Step 3: Cross multiply
    110.13x = 151.88 × 66.43
  4. Step 4: Simplify right side
    110.13x = 10,089.39
  5. Step 5: Solve for x
    x = 10,089.39/110.13
  6. Step 6: Final answer
    x = 91.61

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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.