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Finding the Fourth Proportional to 116.30, 160.13 and 99.88

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Solution

The fourth proportional to 116.30, 160.13 and 99.88 is: 137.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.30 : 160.13 = 99.88 : x
  2. Step 2: Convert to fraction form
    116.30/160.13 = 99.88/x
  3. Step 3: Cross multiply
    116.30x = 160.13 × 99.88
  4. Step 4: Simplify right side
    116.30x = 15,993.78
  5. Step 5: Solve for x
    x = 15,993.78/116.30
  6. Step 6: Final answer
    x = 137.52

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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.