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Finding the Fourth Proportional to 116.88, 174.48 and 99.87

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Solution

The fourth proportional to 116.88, 174.48 and 99.87 is: 149.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.88 : 174.48 = 99.87 : x
  2. Step 2: Convert to fraction form
    116.88/174.48 = 99.87/x
  3. Step 3: Cross multiply
    116.88x = 174.48 × 99.87
  4. Step 4: Simplify right side
    116.88x = 17,425.32
  5. Step 5: Solve for x
    x = 17,425.32/116.88
  6. Step 6: Final answer
    x = 149.09

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.