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Finding the Fourth Proportional to 116.55, 174.42 and 86.04

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Solution

The fourth proportional to 116.55, 174.42 and 86.04 is: 128.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.55 : 174.42 = 86.04 : x
  2. Step 2: Convert to fraction form
    116.55/174.42 = 86.04/x
  3. Step 3: Cross multiply
    116.55x = 174.42 × 86.04
  4. Step 4: Simplify right side
    116.55x = 15,007.10
  5. Step 5: Solve for x
    x = 15,007.10/116.55
  6. Step 6: Final answer
    x = 128.76

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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.