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Finding the Fourth Proportional to 110.47, 152.36 and 81.08

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Solution

The fourth proportional to 110.47, 152.36 and 81.08 is: 111.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.47 : 152.36 = 81.08 : x
  2. Step 2: Convert to fraction form
    110.47/152.36 = 81.08/x
  3. Step 3: Cross multiply
    110.47x = 152.36 × 81.08
  4. Step 4: Simplify right side
    110.47x = 12,353.35
  5. Step 5: Solve for x
    x = 12,353.35/110.47
  6. Step 6: Final answer
    x = 111.83

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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.