Home / 280,344.48-420,587.64-80,660.52

Finding the Fourth Proportional to 280,344.48, 420,587.64 and 80,660.52

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Solution

The fourth proportional to 280,344.48, 420,587.64 and 80,660.52 is: 121,011.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,344.48 : 420,587.64 = 80,660.52 : x
  2. Step 2: Convert to fraction form
    280,344.48/420,587.64 = 80,660.52/x
  3. Step 3: Cross multiply
    280,344.48x = 420,587.64 × 80,660.52
  4. Step 4: Simplify right side
    280,344.48x = 33,924,817,747.97
  5. Step 5: Solve for x
    x = 33,924,817,747.97/280,344.48
  6. Step 6: Final answer
    x = 121,011.19

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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.