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Finding the Fourth Proportional to 115.71, 174.45 and 107.88

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Solution

The fourth proportional to 115.71, 174.45 and 107.88 is: 162.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.71 : 174.45 = 107.88 : x
  2. Step 2: Convert to fraction form
    115.71/174.45 = 107.88/x
  3. Step 3: Cross multiply
    115.71x = 174.45 × 107.88
  4. Step 4: Simplify right side
    115.71x = 18,819.67
  5. Step 5: Solve for x
    x = 18,819.67/115.71
  6. Step 6: Final answer
    x = 162.65

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.