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Finding the Fourth Proportional to 87,698.40, 131,461.20 and 43,288.80

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Solution

The fourth proportional to 87,698.40, 131,461.20 and 43,288.80 is: 64,890.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,698.40 : 131,461.20 = 43,288.80 : x
  2. Step 2: Convert to fraction form
    87,698.40/131,461.20 = 43,288.80/x
  3. Step 3: Cross multiply
    87,698.40x = 131,461.20 × 43,288.80
  4. Step 4: Simplify right side
    87,698.40x = 5,690,797,594.56
  5. Step 5: Solve for x
    x = 5,690,797,594.56/87,698.40
  6. Step 6: Final answer
    x = 64,890.55

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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.