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Finding the Fourth Proportional to 83.08, 114.48 and 61.18

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Solution

The fourth proportional to 83.08, 114.48 and 61.18 is: 84.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.08 : 114.48 = 61.18 : x
  2. Step 2: Convert to fraction form
    83.08/114.48 = 61.18/x
  3. Step 3: Cross multiply
    83.08x = 114.48 × 61.18
  4. Step 4: Simplify right side
    83.08x = 7,003.89
  5. Step 5: Solve for x
    x = 7,003.89/83.08
  6. Step 6: Final answer
    x = 84.30

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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.