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Finding the Fourth Proportional to 83.02, 114.57 and 57.16

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Solution

The fourth proportional to 83.02, 114.57 and 57.16 is: 78.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.02 : 114.57 = 57.16 : x
  2. Step 2: Convert to fraction form
    83.02/114.57 = 57.16/x
  3. Step 3: Cross multiply
    83.02x = 114.57 × 57.16
  4. Step 4: Simplify right side
    83.02x = 6,548.82
  5. Step 5: Solve for x
    x = 6,548.82/83.02
  6. Step 6: Final answer
    x = 78.88

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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.