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Finding the Fourth Proportional to 63,641.97, 87,826.41 and 39,782.70

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Solution

The fourth proportional to 63,641.97, 87,826.41 and 39,782.70 is: 54,900.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,641.97 : 87,826.41 = 39,782.70 : x
  2. Step 2: Convert to fraction form
    63,641.97/87,826.41 = 39,782.70/x
  3. Step 3: Cross multiply
    63,641.97x = 87,826.41 × 39,782.70
  4. Step 4: Simplify right side
    63,641.97x = 3,493,971,721.11
  5. Step 5: Solve for x
    x = 3,493,971,721.11/63,641.97
  6. Step 6: Final answer
    x = 54,900.43

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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.