Home / 280,720.28-420,955.35-80,993.19

Finding the Fourth Proportional to 280,720.28, 420,955.35 and 80,993.19

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Solution

The fourth proportional to 280,720.28, 420,955.35 and 80,993.19 is: 121,453.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,720.28 : 420,955.35 = 80,993.19 : x
  2. Step 2: Convert to fraction form
    280,720.28/420,955.35 = 80,993.19/x
  3. Step 3: Cross multiply
    280,720.28x = 420,955.35 × 80,993.19
  4. Step 4: Simplify right side
    280,720.28x = 34,094,517,418.37
  5. Step 5: Solve for x
    x = 34,094,517,418.37/280,720.28
  6. Step 6: Final answer
    x = 121,453.70

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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.