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Finding the Fourth Proportional to 67.29, 92.77 and 45.42

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Solution

The fourth proportional to 67.29, 92.77 and 45.42 is: 62.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.29 : 92.77 = 45.42 : x
  2. Step 2: Convert to fraction form
    67.29/92.77 = 45.42/x
  3. Step 3: Cross multiply
    67.29x = 92.77 × 45.42
  4. Step 4: Simplify right side
    67.29x = 4,213.61
  5. Step 5: Solve for x
    x = 4,213.61/67.29
  6. Step 6: Final answer
    x = 62.62

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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.