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Finding the Fourth Proportional to 87.34, 120.53 and 48.53

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Solution

The fourth proportional to 87.34, 120.53 and 48.53 is: 66.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.34 : 120.53 = 48.53 : x
  2. Step 2: Convert to fraction form
    87.34/120.53 = 48.53/x
  3. Step 3: Cross multiply
    87.34x = 120.53 × 48.53
  4. Step 4: Simplify right side
    87.34x = 5,849.32
  5. Step 5: Solve for x
    x = 5,849.32/87.34
  6. Step 6: Final answer
    x = 66.97

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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.