Home / 120,997.72-166,832.22-78,540.76

Finding the Fourth Proportional to 120,997.72, 166,832.22 and 78,540.76

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Solution

The fourth proportional to 120,997.72, 166,832.22 and 78,540.76 is: 108,292.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,997.72 : 166,832.22 = 78,540.76 : x
  2. Step 2: Convert to fraction form
    120,997.72/166,832.22 = 78,540.76/x
  3. Step 3: Cross multiply
    120,997.72x = 166,832.22 × 78,540.76
  4. Step 4: Simplify right side
    120,997.72x = 13,103,129,351.29
  5. Step 5: Solve for x
    x = 13,103,129,351.29/120,997.72
  6. Step 6: Final answer
    x = 108,292.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.