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Finding the Fourth Proportional to 116.24, 174.45 and 80.20

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Solution

The fourth proportional to 116.24, 174.45 and 80.20 is: 120.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.24 : 174.45 = 80.20 : x
  2. Step 2: Convert to fraction form
    116.24/174.45 = 80.20/x
  3. Step 3: Cross multiply
    116.24x = 174.45 × 80.20
  4. Step 4: Simplify right side
    116.24x = 13,990.02
  5. Step 5: Solve for x
    x = 13,990.02/116.24
  6. Step 6: Final answer
    x = 120.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.