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Finding the Fourth Proportional to 83.32, 114.76 and 71.64

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Solution

The fourth proportional to 83.32, 114.76 and 71.64 is: 98.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.32 : 114.76 = 71.64 : x
  2. Step 2: Convert to fraction form
    83.32/114.76 = 71.64/x
  3. Step 3: Cross multiply
    83.32x = 114.76 × 71.64
  4. Step 4: Simplify right side
    83.32x = 8,221.41
  5. Step 5: Solve for x
    x = 8,221.41/83.32
  6. Step 6: Final answer
    x = 98.67

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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.