Home / 80,790.32-121,240.84-28,199.80

Finding the Fourth Proportional to 80,790.32, 121,240.84 and 28,199.80

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Solution

The fourth proportional to 80,790.32, 121,240.84 and 28,199.80 is: 42,319.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,790.32 : 121,240.84 = 28,199.80 : x
  2. Step 2: Convert to fraction form
    80,790.32/121,240.84 = 28,199.80/x
  3. Step 3: Cross multiply
    80,790.32x = 121,240.84 × 28,199.80
  4. Step 4: Simplify right side
    80,790.32x = 3,418,967,439.83
  5. Step 5: Solve for x
    x = 3,418,967,439.83/80,790.32
  6. Step 6: Final answer
    x = 42,319.02

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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.