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Finding the Fourth Proportional to 125.40, 187.17 and 118.38

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Solution

The fourth proportional to 125.40, 187.17 and 118.38 is: 176.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.40 : 187.17 = 118.38 : x
  2. Step 2: Convert to fraction form
    125.40/187.17 = 118.38/x
  3. Step 3: Cross multiply
    125.40x = 187.17 × 118.38
  4. Step 4: Simplify right side
    125.40x = 22,157.18
  5. Step 5: Solve for x
    x = 22,157.18/125.40
  6. Step 6: Final answer
    x = 176.69

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.