Home / 185,513.30-278,399.55-80,407.70

Finding the Fourth Proportional to 185,513.30, 278,399.55 and 80,407.70

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Solution

The fourth proportional to 185,513.30, 278,399.55 and 80,407.70 is: 120,667.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,513.30 : 278,399.55 = 80,407.70 : x
  2. Step 2: Convert to fraction form
    185,513.30/278,399.55 = 80,407.70/x
  3. Step 3: Cross multiply
    185,513.30x = 278,399.55 × 80,407.70
  4. Step 4: Simplify right side
    185,513.30x = 22,385,467,496.54
  5. Step 5: Solve for x
    x = 22,385,467,496.54/185,513.30
  6. Step 6: Final answer
    x = 120,667.72

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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.