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Finding the Fourth Proportional to 125.87, 173.25 and 102.40

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Solution

The fourth proportional to 125.87, 173.25 and 102.40 is: 140.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.87 : 173.25 = 102.40 : x
  2. Step 2: Convert to fraction form
    125.87/173.25 = 102.40/x
  3. Step 3: Cross multiply
    125.87x = 173.25 × 102.40
  4. Step 4: Simplify right side
    125.87x = 17,741.24
  5. Step 5: Solve for x
    x = 17,741.24/125.87
  6. Step 6: Final answer
    x = 140.95

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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.