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Finding the Fourth Proportional to 116.13, 160.13 and 86.97

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Solution

The fourth proportional to 116.13, 160.13 and 86.97 is: 119.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.13 : 160.13 = 86.97 : x
  2. Step 2: Convert to fraction form
    116.13/160.13 = 86.97/x
  3. Step 3: Cross multiply
    116.13x = 160.13 × 86.97
  4. Step 4: Simplify right side
    116.13x = 13,926.07
  5. Step 5: Solve for x
    x = 13,926.07/116.13
  6. Step 6: Final answer
    x = 119.92

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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.