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Finding the Fourth Proportional to 82.88, 125.03 and 79.70

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Solution

The fourth proportional to 82.88, 125.03 and 79.70 is: 120.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.88 : 125.03 = 79.70 : x
  2. Step 2: Convert to fraction form
    82.88/125.03 = 79.70/x
  3. Step 3: Cross multiply
    82.88x = 125.03 × 79.70
  4. Step 4: Simplify right side
    82.88x = 9,964.89
  5. Step 5: Solve for x
    x = 9,964.89/82.88
  6. Step 6: Final answer
    x = 120.23

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.