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Finding the Fourth Proportional to 125.95, 173.71 and 111.21

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Solution

The fourth proportional to 125.95, 173.71 and 111.21 is: 153.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.95 : 173.71 = 111.21 : x
  2. Step 2: Convert to fraction form
    125.95/173.71 = 111.21/x
  3. Step 3: Cross multiply
    125.95x = 173.71 × 111.21
  4. Step 4: Simplify right side
    125.95x = 19,318.01
  5. Step 5: Solve for x
    x = 19,318.01/125.95
  6. Step 6: Final answer
    x = 153.38

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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.