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Finding the Fourth Proportional to 100.08, 137.97 and 88.47

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Solution

The fourth proportional to 100.08, 137.97 and 88.47 is: 121.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.08 : 137.97 = 88.47 : x
  2. Step 2: Convert to fraction form
    100.08/137.97 = 88.47/x
  3. Step 3: Cross multiply
    100.08x = 137.97 × 88.47
  4. Step 4: Simplify right side
    100.08x = 12,206.21
  5. Step 5: Solve for x
    x = 12,206.21/100.08
  6. Step 6: Final answer
    x = 121.96

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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.