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Finding the Fourth Proportional to 110.39, 152.29 and 85.66

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Solution

The fourth proportional to 110.39, 152.29 and 85.66 is: 118.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.39 : 152.29 = 85.66 : x
  2. Step 2: Convert to fraction form
    110.39/152.29 = 85.66/x
  3. Step 3: Cross multiply
    110.39x = 152.29 × 85.66
  4. Step 4: Simplify right side
    110.39x = 13,045.08
  5. Step 5: Solve for x
    x = 13,045.08/110.39
  6. Step 6: Final answer
    x = 118.17

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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.