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Finding the Fourth Proportional to 125.55, 186.74 and 115.22

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Solution

The fourth proportional to 125.55, 186.74 and 115.22 is: 171.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.55 : 186.74 = 115.22 : x
  2. Step 2: Convert to fraction form
    125.55/186.74 = 115.22/x
  3. Step 3: Cross multiply
    125.55x = 186.74 × 115.22
  4. Step 4: Simplify right side
    125.55x = 21,515.72
  5. Step 5: Solve for x
    x = 21,515.72/125.55
  6. Step 6: Final answer
    x = 171.38

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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.