Home / 87,339,881.20-131,009,821.80-78,836,825.20

Finding the Fourth Proportional to 87,339,881.20, 131,009,821.80 and 78,836,825.20

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Solution

The fourth proportional to 87,339,881.20, 131,009,821.80 and 78,836,825.20 is: 118,255,237.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,339,881.20 : 131,009,821.80 = 78,836,825.20 : x
  2. Step 2: Convert to fraction form
    87,339,881.20/131,009,821.80 = 78,836,825.20/x
  3. Step 3: Cross multiply
    87,339,881.20x = 131,009,821.80 × 78,836,825.20
  4. Step 4: Simplify right side
    87,339,881.20x = 10,328,398,420,729,750
  5. Step 5: Solve for x
    x = 10,328,398,420,729,750/87,339,881.20
  6. Step 6: Final answer
    x = 118,255,237.80

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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.