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Finding the Fourth Proportional to 124.93, 187.47 and 51.86

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Solution

The fourth proportional to 124.93, 187.47 and 51.86 is: 77.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.93 : 187.47 = 51.86 : x
  2. Step 2: Convert to fraction form
    124.93/187.47 = 51.86/x
  3. Step 3: Cross multiply
    124.93x = 187.47 × 51.86
  4. Step 4: Simplify right side
    124.93x = 9,722.19
  5. Step 5: Solve for x
    x = 9,722.19/124.93
  6. Step 6: Final answer
    x = 77.82

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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.