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Finding the Fourth Proportional to 124.86, 187.22 and 51.68

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Solution

The fourth proportional to 124.86, 187.22 and 51.68 is: 77.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.86 : 187.22 = 51.68 : x
  2. Step 2: Convert to fraction form
    124.86/187.22 = 51.68/x
  3. Step 3: Cross multiply
    124.86x = 187.22 × 51.68
  4. Step 4: Simplify right side
    124.86x = 9,675.53
  5. Step 5: Solve for x
    x = 9,675.53/124.86
  6. Step 6: Final answer
    x = 77.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.