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Finding the Fourth Proportional to 83.31, 124.84 and 47.16

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Solution

The fourth proportional to 83.31, 124.84 and 47.16 is: 70.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.31 : 124.84 = 47.16 : x
  2. Step 2: Convert to fraction form
    83.31/124.84 = 47.16/x
  3. Step 3: Cross multiply
    83.31x = 124.84 × 47.16
  4. Step 4: Simplify right side
    83.31x = 5,887.22
  5. Step 5: Solve for x
    x = 5,887.22/83.31
  6. Step 6: Final answer
    x = 70.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.