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Finding the Fourth Proportional to 84.68, 126.86 and 60.68

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Solution

The fourth proportional to 84.68, 126.86 and 60.68 is: 90.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.68 : 126.86 = 60.68 : x
  2. Step 2: Convert to fraction form
    84.68/126.86 = 60.68/x
  3. Step 3: Cross multiply
    84.68x = 126.86 × 60.68
  4. Step 4: Simplify right side
    84.68x = 7,697.86
  5. Step 5: Solve for x
    x = 7,697.86/84.68
  6. Step 6: Final answer
    x = 90.91

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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.