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Finding the Fourth Proportional to 125.32, 187.84 and 71.16

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Solution

The fourth proportional to 125.32, 187.84 and 71.16 is: 106.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.32 : 187.84 = 71.16 : x
  2. Step 2: Convert to fraction form
    125.32/187.84 = 71.16/x
  3. Step 3: Cross multiply
    125.32x = 187.84 × 71.16
  4. Step 4: Simplify right side
    125.32x = 13,366.69
  5. Step 5: Solve for x
    x = 13,366.69/125.32
  6. Step 6: Final answer
    x = 106.66

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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.