Home / 80,519,911.20-120,638,149.20-69,182,503.20

Finding the Fourth Proportional to 80,519,911.20, 120,638,149.20 and 69,182,503.20

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Solution

The fourth proportional to 80,519,911.20, 120,638,149.20 and 69,182,503.20 is: 103,651,991.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,519,911.20 : 120,638,149.20 = 69,182,503.20 : x
  2. Step 2: Convert to fraction form
    80,519,911.20/120,638,149.20 = 69,182,503.20/x
  3. Step 3: Cross multiply
    80,519,911.20x = 120,638,149.20 × 69,182,503.20
  4. Step 4: Simplify right side
    80,519,911.20x = 8,346,049,143,071,078
  5. Step 5: Solve for x
    x = 8,346,049,143,071,078/80,519,911.20
  6. Step 6: Final answer
    x = 103,651,991.40

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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.