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Finding the Fourth Proportional to 69.41, 103.54 and 60.86

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Solution

The fourth proportional to 69.41, 103.54 and 60.86 is: 90.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.41 : 103.54 = 60.86 : x
  2. Step 2: Convert to fraction form
    69.41/103.54 = 60.86/x
  3. Step 3: Cross multiply
    69.41x = 103.54 × 60.86
  4. Step 4: Simplify right side
    69.41x = 6,300.77
  5. Step 5: Solve for x
    x = 6,300.77/69.41
  6. Step 6: Final answer
    x = 90.78

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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.