Home / 280,553.20-420,888.88-90,998.74

Finding the Fourth Proportional to 280,553.20, 420,888.88 and 90,998.74

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Solution

The fourth proportional to 280,553.20, 420,888.88 and 90,998.74 is: 136,517.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,553.20 : 420,888.88 = 90,998.74 : x
  2. Step 2: Convert to fraction form
    280,553.20/420,888.88 = 90,998.74/x
  3. Step 3: Cross multiply
    280,553.20x = 420,888.88 × 90,998.74
  4. Step 4: Simplify right side
    280,553.20x = 38,300,357,760.01
  5. Step 5: Solve for x
    x = 38,300,357,760.01/280,553.20
  6. Step 6: Final answer
    x = 136,517.27

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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.