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Finding the Fourth Proportional to 83.58, 115.36 and 59.04

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Solution

The fourth proportional to 83.58, 115.36 and 59.04 is: 81.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.58 : 115.36 = 59.04 : x
  2. Step 2: Convert to fraction form
    83.58/115.36 = 59.04/x
  3. Step 3: Cross multiply
    83.58x = 115.36 × 59.04
  4. Step 4: Simplify right side
    83.58x = 6,810.85
  5. Step 5: Solve for x
    x = 6,810.85/83.58
  6. Step 6: Final answer
    x = 81.49

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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.