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Finding the Fourth Proportional to 83.17, 114.78 and 57.25

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Solution

The fourth proportional to 83.17, 114.78 and 57.25 is: 79.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.17 : 114.78 = 57.25 : x
  2. Step 2: Convert to fraction form
    83.17/114.78 = 57.25/x
  3. Step 3: Cross multiply
    83.17x = 114.78 × 57.25
  4. Step 4: Simplify right side
    83.17x = 6,571.16
  5. Step 5: Solve for x
    x = 6,571.16/83.17
  6. Step 6: Final answer
    x = 79.01

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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.