Home / 80,002.77-120,004.11-20,838.30

Finding the Fourth Proportional to 80,002.77, 120,004.11 and 20,838.30

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Solution

The fourth proportional to 80,002.77, 120,004.11 and 20,838.30 is: 31,257.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,002.77 : 120,004.11 = 20,838.30 : x
  2. Step 2: Convert to fraction form
    80,002.77/120,004.11 = 20,838.30/x
  3. Step 3: Cross multiply
    80,002.77x = 120,004.11 × 20,838.30
  4. Step 4: Simplify right side
    80,002.77x = 2,500,681,645.41
  5. Step 5: Solve for x
    x = 2,500,681,645.41/80,002.77
  6. Step 6: Final answer
    x = 31,257.44

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1.5x scale

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.