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Finding the Fourth Proportional to 125.82, 173.60 and 76.71

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Solution

The fourth proportional to 125.82, 173.60 and 76.71 is: 105.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.82 : 173.60 = 76.71 : x
  2. Step 2: Convert to fraction form
    125.82/173.60 = 76.71/x
  3. Step 3: Cross multiply
    125.82x = 173.60 × 76.71
  4. Step 4: Simplify right side
    125.82x = 13,316.61
  5. Step 5: Solve for x
    x = 13,316.61/125.82
  6. Step 6: Final answer
    x = 105.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.