Home / 280,118.28-420,053.48-80,392.34

Finding the Fourth Proportional to 280,118.28, 420,053.48 and 80,392.34

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Solution

The fourth proportional to 280,118.28, 420,053.48 and 80,392.34 is: 120,552.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,118.28 : 420,053.48 = 80,392.34 : x
  2. Step 2: Convert to fraction form
    280,118.28/420,053.48 = 80,392.34/x
  3. Step 3: Cross multiply
    280,118.28x = 420,053.48 × 80,392.34
  4. Step 4: Simplify right side
    280,118.28x = 33,769,082,182.34
  5. Step 5: Solve for x
    x = 33,769,082,182.34/280,118.28
  6. Step 6: Final answer
    x = 120,552.94

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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.