Home / 120,157.25-180,246.12-31,410.61

Finding the Fourth Proportional to 120,157.25, 180,246.12 and 31,410.61

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Solution

The fourth proportional to 120,157.25, 180,246.12 and 31,410.61 is: 47,118.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,157.25 : 180,246.12 = 31,410.61 : x
  2. Step 2: Convert to fraction form
    120,157.25/180,246.12 = 31,410.61/x
  3. Step 3: Cross multiply
    120,157.25x = 180,246.12 × 31,410.61
  4. Step 4: Simplify right side
    120,157.25x = 5,661,640,128.72
  5. Step 5: Solve for x
    x = 5,661,640,128.72/120,157.25
  6. Step 6: Final answer
    x = 47,118.59

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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.