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Finding the Fourth Proportional to 99.33, 136.08 and 93.86

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Solution

The fourth proportional to 99.33, 136.08 and 93.86 is: 128.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.33 : 136.08 = 93.86 : x
  2. Step 2: Convert to fraction form
    99.33/136.08 = 93.86/x
  3. Step 3: Cross multiply
    99.33x = 136.08 × 93.86
  4. Step 4: Simplify right side
    99.33x = 12,772.30
  5. Step 5: Solve for x
    x = 12,772.30/99.33
  6. Step 6: Final answer
    x = 128.59

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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.