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Finding the Fourth Proportional to 67.60, 93.18 and 66.76

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Solution

The fourth proportional to 67.60, 93.18 and 66.76 is: 92.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.60 : 93.18 = 66.76 : x
  2. Step 2: Convert to fraction form
    67.60/93.18 = 66.76/x
  3. Step 3: Cross multiply
    67.60x = 93.18 × 66.76
  4. Step 4: Simplify right side
    67.60x = 6,220.70
  5. Step 5: Solve for x
    x = 6,220.70/67.60
  6. Step 6: Final answer
    x = 92.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.