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Finding the Fourth Proportional to 83.53, 125.09 and 47.30

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Solution

The fourth proportional to 83.53, 125.09 and 47.30 is: 70.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.53 : 125.09 = 47.30 : x
  2. Step 2: Convert to fraction form
    83.53/125.09 = 47.30/x
  3. Step 3: Cross multiply
    83.53x = 125.09 × 47.30
  4. Step 4: Simplify right side
    83.53x = 5,916.52
  5. Step 5: Solve for x
    x = 5,916.52/83.53
  6. Step 6: Final answer
    x = 70.84

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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.