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Finding the Fourth Proportional to 153.14, 229.77 and 66.55

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Solution

The fourth proportional to 153.14, 229.77 and 66.55 is: 99.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.14 : 229.77 = 66.55 : x
  2. Step 2: Convert to fraction form
    153.14/229.77 = 66.55/x
  3. Step 3: Cross multiply
    153.14x = 229.77 × 66.55
  4. Step 4: Simplify right side
    153.14x = 15,290.57
  5. Step 5: Solve for x
    x = 15,290.57/153.14
  6. Step 6: Final answer
    x = 99.85

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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.