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Finding the Fourth Proportional to 116.47, 160.75 and 79.61

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Solution

The fourth proportional to 116.47, 160.75 and 79.61 is: 109.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.47 : 160.75 = 79.61 : x
  2. Step 2: Convert to fraction form
    116.47/160.75 = 79.61/x
  3. Step 3: Cross multiply
    116.47x = 160.75 × 79.61
  4. Step 4: Simplify right side
    116.47x = 12,797.31
  5. Step 5: Solve for x
    x = 12,797.31/116.47
  6. Step 6: Final answer
    x = 109.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.