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Finding the Fourth Proportional to 116.28, 159.48 and 113.58

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Solution

The fourth proportional to 116.28, 159.48 and 113.58 is: 155.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.28 : 159.48 = 113.58 : x
  2. Step 2: Convert to fraction form
    116.28/159.48 = 113.58/x
  3. Step 3: Cross multiply
    116.28x = 159.48 × 113.58
  4. Step 4: Simplify right side
    116.28x = 18,113.74
  5. Step 5: Solve for x
    x = 18,113.74/116.28
  6. Step 6: Final answer
    x = 155.78

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.