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Finding the Fourth Proportional to 116.52, 175.40 and 84.24

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Solution

The fourth proportional to 116.52, 175.40 and 84.24 is: 126.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.52 : 175.40 = 84.24 : x
  2. Step 2: Convert to fraction form
    116.52/175.40 = 84.24/x
  3. Step 3: Cross multiply
    116.52x = 175.40 × 84.24
  4. Step 4: Simplify right side
    116.52x = 14,775.27
  5. Step 5: Solve for x
    x = 14,775.27/116.52
  6. Step 6: Final answer
    x = 126.80

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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.