Home / 80,518,129.20-120,635,476.20-69,180,721.20

Finding the Fourth Proportional to 80,518,129.20, 120,635,476.20 and 69,180,721.20

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Solution

The fourth proportional to 80,518,129.20, 120,635,476.20 and 69,180,721.20 is: 103,649,318.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,518,129.20 : 120,635,476.20 = 69,180,721.20 : x
  2. Step 2: Convert to fraction form
    80,518,129.20/120,635,476.20 = 69,180,721.20/x
  3. Step 3: Cross multiply
    80,518,129.20x = 120,635,476.20 × 69,180,721.20
  4. Step 4: Simplify right side
    80,518,129.20x = 8,345,649,245,821,436
  5. Step 5: Solve for x
    x = 8,345,649,245,821,436/80,518,129.20
  6. Step 6: Final answer
    x = 103,649,318.84

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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.