Home / 80,790.17-121,240.61-28,199.66

Finding the Fourth Proportional to 80,790.17, 121,240.61 and 28,199.66

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Solution

The fourth proportional to 80,790.17, 121,240.61 and 28,199.66 is: 42,318.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,790.17 : 121,240.61 = 28,199.66 : x
  2. Step 2: Convert to fraction form
    80,790.17/121,240.61 = 28,199.66/x
  3. Step 3: Cross multiply
    80,790.17x = 121,240.61 × 28,199.66
  4. Step 4: Simplify right side
    80,790.17x = 3,418,943,232.99
  5. Step 5: Solve for x
    x = 3,418,943,232.99/80,790.17
  6. Step 6: Final answer
    x = 42,318.80

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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.