Home / 86,231,720.20-129,347,580.30-80,521,025.80

Finding the Fourth Proportional to 86,231,720.20, 129,347,580.30 and 80,521,025.80

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Solution

The fourth proportional to 86,231,720.20, 129,347,580.30 and 80,521,025.80 is: 120,781,538.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,231,720.20 : 129,347,580.30 = 80,521,025.80 : x
  2. Step 2: Convert to fraction form
    86,231,720.20/129,347,580.30 = 80,521,025.80/x
  3. Step 3: Cross multiply
    86,231,720.20x = 129,347,580.30 × 80,521,025.80
  4. Step 4: Simplify right side
    86,231,720.20x = 10,415,199,850,503,872
  5. Step 5: Solve for x
    x = 10,415,199,850,503,872/86,231,720.20
  6. Step 6: Final answer
    x = 120,781,538.70

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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.