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Finding the Fourth Proportional to 169.80, 254.63 and 61.61

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Solution

The fourth proportional to 169.80, 254.63 and 61.61 is: 92.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.80 : 254.63 = 61.61 : x
  2. Step 2: Convert to fraction form
    169.80/254.63 = 61.61/x
  3. Step 3: Cross multiply
    169.80x = 254.63 × 61.61
  4. Step 4: Simplify right side
    169.80x = 15,686.17
  5. Step 5: Solve for x
    x = 15,686.17/169.80
  6. Step 6: Final answer
    x = 92.38

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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.