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Finding the Fourth Proportional to 138,615.72, 207,939.84 and 48,630.92

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Solution

The fourth proportional to 138,615.72, 207,939.84 and 48,630.92 is: 72,952.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,615.72 : 207,939.84 = 48,630.92 : x
  2. Step 2: Convert to fraction form
    138,615.72/207,939.84 = 48,630.92/x
  3. Step 3: Cross multiply
    138,615.72x = 207,939.84 × 48,630.92
  4. Step 4: Simplify right side
    138,615.72x = 10,112,305,723.85
  5. Step 5: Solve for x
    x = 10,112,305,723.85/138,615.72
  6. Step 6: Final answer
    x = 72,952.08

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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.