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Finding the Fourth Proportional to 83.55, 115.34 and 52.47

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Solution

The fourth proportional to 83.55, 115.34 and 52.47 is: 72.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.55 : 115.34 = 52.47 : x
  2. Step 2: Convert to fraction form
    83.55/115.34 = 52.47/x
  3. Step 3: Cross multiply
    83.55x = 115.34 × 52.47
  4. Step 4: Simplify right side
    83.55x = 6,052.02
  5. Step 5: Solve for x
    x = 6,052.02/83.55
  6. Step 6: Final answer
    x = 72.44

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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.