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Finding the Fourth Proportional to 116.28, 174.20 and 54.63

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Solution

The fourth proportional to 116.28, 174.20 and 54.63 is: 81.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.28 : 174.20 = 54.63 : x
  2. Step 2: Convert to fraction form
    116.28/174.20 = 54.63/x
  3. Step 3: Cross multiply
    116.28x = 174.20 × 54.63
  4. Step 4: Simplify right side
    116.28x = 9,516.55
  5. Step 5: Solve for x
    x = 9,516.55/116.28
  6. Step 6: Final answer
    x = 81.84

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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.