Home / 120,158.25-180,247.62-31,411.61

Finding the Fourth Proportional to 120,158.25, 180,247.62 and 31,411.61

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Solution

The fourth proportional to 120,158.25, 180,247.62 and 31,411.61 is: 47,120.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,158.25 : 180,247.62 = 31,411.61 : x
  2. Step 2: Convert to fraction form
    120,158.25/180,247.62 = 31,411.61/x
  3. Step 3: Cross multiply
    120,158.25x = 180,247.62 × 31,411.61
  4. Step 4: Simplify right side
    120,158.25x = 5,661,867,942.87
  5. Step 5: Solve for x
    x = 5,661,867,942.87/120,158.25
  6. Step 6: Final answer
    x = 47,120.09

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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.