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Finding the Fourth Proportional to 116.40, 175.40 and 115.60

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Solution

The fourth proportional to 116.40, 175.40 and 115.60 is: 174.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.40 : 175.40 = 115.60 : x
  2. Step 2: Convert to fraction form
    116.40/175.40 = 115.60/x
  3. Step 3: Cross multiply
    116.40x = 175.40 × 115.60
  4. Step 4: Simplify right side
    116.40x = 20,276.24
  5. Step 5: Solve for x
    x = 20,276.24/116.40
  6. Step 6: Final answer
    x = 174.19

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.