Home / 87,339,877.20-131,009,815.80-78,836,821.20

Finding the Fourth Proportional to 87,339,877.20, 131,009,815.80 and 78,836,821.20

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Solution

The fourth proportional to 87,339,877.20, 131,009,815.80 and 78,836,821.20 is: 118,255,231.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,339,877.20 : 131,009,815.80 = 78,836,821.20 : x
  2. Step 2: Convert to fraction form
    87,339,877.20/131,009,815.80 = 78,836,821.20/x
  3. Step 3: Cross multiply
    87,339,877.20x = 131,009,815.80 × 78,836,821.20
  4. Step 4: Simplify right side
    87,339,877.20x = 10,328,397,423,669,536
  5. Step 5: Solve for x
    x = 10,328,397,423,669,536/87,339,877.20
  6. Step 6: Final answer
    x = 118,255,231.80

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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.