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Finding the Fourth Proportional to 125.65, 187.36 and 124.45

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Solution

The fourth proportional to 125.65, 187.36 and 124.45 is: 185.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.65 : 187.36 = 124.45 : x
  2. Step 2: Convert to fraction form
    125.65/187.36 = 124.45/x
  3. Step 3: Cross multiply
    125.65x = 187.36 × 124.45
  4. Step 4: Simplify right side
    125.65x = 23,316.95
  5. Step 5: Solve for x
    x = 23,316.95/125.65
  6. Step 6: Final answer
    x = 185.57

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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.