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Finding the Fourth Proportional to 100.09, 137.80 and 94.96

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Solution

The fourth proportional to 100.09, 137.80 and 94.96 is: 130.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.09 : 137.80 = 94.96 : x
  2. Step 2: Convert to fraction form
    100.09/137.80 = 94.96/x
  3. Step 3: Cross multiply
    100.09x = 137.80 × 94.96
  4. Step 4: Simplify right side
    100.09x = 13,085.01
  5. Step 5: Solve for x
    x = 13,085.01/100.09
  6. Step 6: Final answer
    x = 130.73

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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.