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Finding the Fourth Proportional to 83.50, 125.04 and 57.76

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Solution

The fourth proportional to 83.50, 125.04 and 57.76 is: 86.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.50 : 125.04 = 57.76 : x
  2. Step 2: Convert to fraction form
    83.50/125.04 = 57.76/x
  3. Step 3: Cross multiply
    83.50x = 125.04 × 57.76
  4. Step 4: Simplify right side
    83.50x = 7,222.31
  5. Step 5: Solve for x
    x = 7,222.31/83.50
  6. Step 6: Final answer
    x = 86.49

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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.