Home / 187,259.20-280,305.60-108,138.40

Finding the Fourth Proportional to 187,259.20, 280,305.60 and 108,138.40

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Solution

The fourth proportional to 187,259.20, 280,305.60 and 108,138.40 is: 161,870.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,259.20 : 280,305.60 = 108,138.40 : x
  2. Step 2: Convert to fraction form
    187,259.20/280,305.60 = 108,138.40/x
  3. Step 3: Cross multiply
    187,259.20x = 280,305.60 × 108,138.40
  4. Step 4: Simplify right side
    187,259.20x = 30,311,799,095.04
  5. Step 5: Solve for x
    x = 30,311,799,095.04/187,259.20
  6. Step 6: Final answer
    x = 161,870.81

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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.