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Finding the Fourth Proportional to 137.46, 189.36 and 97.92

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Solution

The fourth proportional to 137.46, 189.36 and 97.92 is: 134.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.46 : 189.36 = 97.92 : x
  2. Step 2: Convert to fraction form
    137.46/189.36 = 97.92/x
  3. Step 3: Cross multiply
    137.46x = 189.36 × 97.92
  4. Step 4: Simplify right side
    137.46x = 18,542.13
  5. Step 5: Solve for x
    x = 18,542.13/137.46
  6. Step 6: Final answer
    x = 134.89

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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.