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Finding the Fourth Proportional to 125.50, 173.36 and 99.55

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Solution

The fourth proportional to 125.50, 173.36 and 99.55 is: 137.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.50 : 173.36 = 99.55 : x
  2. Step 2: Convert to fraction form
    125.50/173.36 = 99.55/x
  3. Step 3: Cross multiply
    125.50x = 173.36 × 99.55
  4. Step 4: Simplify right side
    125.50x = 17,257.74
  5. Step 5: Solve for x
    x = 17,257.74/125.50
  6. Step 6: Final answer
    x = 137.51

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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.