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Finding the Fourth Proportional to 137.92, 206.89 and 46.61

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Solution

The fourth proportional to 137.92, 206.89 and 46.61 is: 69.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.92 : 206.89 = 46.61 : x
  2. Step 2: Convert to fraction form
    137.92/206.89 = 46.61/x
  3. Step 3: Cross multiply
    137.92x = 206.89 × 46.61
  4. Step 4: Simplify right side
    137.92x = 9,643.43
  5. Step 5: Solve for x
    x = 9,643.43/137.92
  6. Step 6: Final answer
    x = 69.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.