Home / 120,128.92-180,195.13-31,382.44

Finding the Fourth Proportional to 120,128.92, 180,195.13 and 31,382.44

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Solution

The fourth proportional to 120,128.92, 180,195.13 and 31,382.44 is: 47,074.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,128.92 : 180,195.13 = 31,382.44 : x
  2. Step 2: Convert to fraction form
    120,128.92/180,195.13 = 31,382.44/x
  3. Step 3: Cross multiply
    120,128.92x = 180,195.13 × 31,382.44
  4. Step 4: Simplify right side
    120,128.92x = 5,654,962,444.26
  5. Step 5: Solve for x
    x = 5,654,962,444.26/120,128.92
  6. Step 6: Final answer
    x = 47,074.11

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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.