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Finding the Fourth Proportional to 63,671.28, 87,866.89 and 39,811.79

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Solution

The fourth proportional to 63,671.28, 87,866.89 and 39,811.79 is: 54,940.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,671.28 : 87,866.89 = 39,811.79 : x
  2. Step 2: Convert to fraction form
    63,671.28/87,866.89 = 39,811.79/x
  3. Step 3: Cross multiply
    63,671.28x = 87,866.89 × 39,811.79
  4. Step 4: Simplify right side
    63,671.28x = 3,498,137,633.77
  5. Step 5: Solve for x
    x = 3,498,137,633.77/63,671.28
  6. Step 6: Final answer
    x = 54,940.59

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1.5x scale

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.