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Finding the Fourth Proportional to 83.08, 114.60 and 61.30

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Solution

The fourth proportional to 83.08, 114.60 and 61.30 is: 84.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.08 : 114.60 = 61.30 : x
  2. Step 2: Convert to fraction form
    83.08/114.60 = 61.30/x
  3. Step 3: Cross multiply
    83.08x = 114.60 × 61.30
  4. Step 4: Simplify right side
    83.08x = 7,024.98
  5. Step 5: Solve for x
    x = 7,024.98/83.08
  6. Step 6: Final answer
    x = 84.56

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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.