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Finding the Fourth Proportional to 100.44, 136.89 and 99.63

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Solution

The fourth proportional to 100.44, 136.89 and 99.63 is: 135.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.44 : 136.89 = 99.63 : x
  2. Step 2: Convert to fraction form
    100.44/136.89 = 99.63/x
  3. Step 3: Cross multiply
    100.44x = 136.89 × 99.63
  4. Step 4: Simplify right side
    100.44x = 13,638.35
  5. Step 5: Solve for x
    x = 13,638.35/100.44
  6. Step 6: Final answer
    x = 135.79

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.