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Finding the Fourth Proportional to 67.20, 92.67 and 45.87

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Solution

The fourth proportional to 67.20, 92.67 and 45.87 is: 63.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.20 : 92.67 = 45.87 : x
  2. Step 2: Convert to fraction form
    67.20/92.67 = 45.87/x
  3. Step 3: Cross multiply
    67.20x = 92.67 × 45.87
  4. Step 4: Simplify right side
    67.20x = 4,250.77
  5. Step 5: Solve for x
    x = 4,250.77/67.20
  6. Step 6: Final answer
    x = 63.26

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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.