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Finding the Fourth Proportional to 100.33, 137.43 and 99.25

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Solution

The fourth proportional to 100.33, 137.43 and 99.25 is: 135.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.33 : 137.43 = 99.25 : x
  2. Step 2: Convert to fraction form
    100.33/137.43 = 99.25/x
  3. Step 3: Cross multiply
    100.33x = 137.43 × 99.25
  4. Step 4: Simplify right side
    100.33x = 13,639.93
  5. Step 5: Solve for x
    x = 13,639.93/100.33
  6. Step 6: Final answer
    x = 135.95

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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.