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Finding the Fourth Proportional to 116.36, 174.58 and 86.32

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Solution

The fourth proportional to 116.36, 174.58 and 86.32 is: 129.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.36 : 174.58 = 86.32 : x
  2. Step 2: Convert to fraction form
    116.36/174.58 = 86.32/x
  3. Step 3: Cross multiply
    116.36x = 174.58 × 86.32
  4. Step 4: Simplify right side
    116.36x = 15,069.75
  5. Step 5: Solve for x
    x = 15,069.75/116.36
  6. Step 6: Final answer
    x = 129.51

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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.