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Finding the Fourth Proportional to 116.17, 174 and 87.34

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Solution

The fourth proportional to 116.17, 174 and 87.34 is: 130.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.17 : 174 = 87.34 : x
  2. Step 2: Convert to fraction form
    116.17/174 = 87.34/x
  3. Step 3: Cross multiply
    116.17x = 174 × 87.34
  4. Step 4: Simplify right side
    116.17x = 15,197.16
  5. Step 5: Solve for x
    x = 15,197.16/116.17
  6. Step 6: Final answer
    x = 130.82

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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.