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Finding the Fourth Proportional to 125.62, 188.39 and 87.14

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Solution

The fourth proportional to 125.62, 188.39 and 87.14 is: 130.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.62 : 188.39 = 87.14 : x
  2. Step 2: Convert to fraction form
    125.62/188.39 = 87.14/x
  3. Step 3: Cross multiply
    125.62x = 188.39 × 87.14
  4. Step 4: Simplify right side
    125.62x = 16,416.99
  5. Step 5: Solve for x
    x = 16,416.99/125.62
  6. Step 6: Final answer
    x = 130.69

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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.