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Finding the Fourth Proportional to 85.02, 116.56 and 82.72

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Solution

The fourth proportional to 85.02, 116.56 and 82.72 is: 113.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    85.02 : 116.56 = 82.72 : x
  2. Step 2: Convert to fraction form
    85.02/116.56 = 82.72/x
  3. Step 3: Cross multiply
    85.02x = 116.56 × 82.72
  4. Step 4: Simplify right side
    85.02x = 9,641.63
  5. Step 5: Solve for x
    x = 9,641.63/85.02
  6. Step 6: Final answer
    x = 113.41

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.