Home / 120,614.20-181,115.70-81,345.40

Finding the Fourth Proportional to 120,614.20, 181,115.70 and 81,345.40

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Solution

The fourth proportional to 120,614.20, 181,115.70 and 81,345.40 is: 122,149.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,614.20 : 181,115.70 = 81,345.40 : x
  2. Step 2: Convert to fraction form
    120,614.20/181,115.70 = 81,345.40/x
  3. Step 3: Cross multiply
    120,614.20x = 181,115.70 × 81,345.40
  4. Step 4: Simplify right side
    120,614.20x = 14,732,929,062.78
  5. Step 5: Solve for x
    x = 14,732,929,062.78/120,614.20
  6. Step 6: Final answer
    x = 122,149.21

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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.