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Finding the Fourth Proportional to 117.24, 175.51 and 86.73

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Solution

The fourth proportional to 117.24, 175.51 and 86.73 is: 129.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.24 : 175.51 = 86.73 : x
  2. Step 2: Convert to fraction form
    117.24/175.51 = 86.73/x
  3. Step 3: Cross multiply
    117.24x = 175.51 × 86.73
  4. Step 4: Simplify right side
    117.24x = 15,221.98
  5. Step 5: Solve for x
    x = 15,221.98/117.24
  6. Step 6: Final answer
    x = 129.84

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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.