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Finding the Fourth Proportional to 110.55, 152.51 and 66.87

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Solution

The fourth proportional to 110.55, 152.51 and 66.87 is: 92.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.55 : 152.51 = 66.87 : x
  2. Step 2: Convert to fraction form
    110.55/152.51 = 66.87/x
  3. Step 3: Cross multiply
    110.55x = 152.51 × 66.87
  4. Step 4: Simplify right side
    110.55x = 10,197.58
  5. Step 5: Solve for x
    x = 10,197.58/110.55
  6. Step 6: Final answer
    x = 92.25

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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.