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Finding the Fourth Proportional to 83.30, 114.78 and 58.66

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Solution

The fourth proportional to 83.30, 114.78 and 58.66 is: 80.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.30 : 114.78 = 58.66 : x
  2. Step 2: Convert to fraction form
    83.30/114.78 = 58.66/x
  3. Step 3: Cross multiply
    83.30x = 114.78 × 58.66
  4. Step 4: Simplify right side
    83.30x = 6,732.93
  5. Step 5: Solve for x
    x = 6,732.93/83.30
  6. Step 6: Final answer
    x = 80.83

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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.