Home / 87,687.72-121,009.82-49,964.40

Finding the Fourth Proportional to 87,687.72, 121,009.82 and 49,964.40

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Solution

The fourth proportional to 87,687.72, 121,009.82 and 49,964.40 is: 68,951.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,687.72 : 121,009.82 = 49,964.40 : x
  2. Step 2: Convert to fraction form
    87,687.72/121,009.82 = 49,964.40/x
  3. Step 3: Cross multiply
    87,687.72x = 121,009.82 × 49,964.40
  4. Step 4: Simplify right side
    87,687.72x = 6,046,182,800.59
  5. Step 5: Solve for x
    x = 6,046,182,800.59/87,687.72
  6. Step 6: Final answer
    x = 68,951.31

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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.