Home / 123,212.20-184,818.30-81,221.80

Finding the Fourth Proportional to 123,212.20, 184,818.30 and 81,221.80

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Solution

The fourth proportional to 123,212.20, 184,818.30 and 81,221.80 is: 121,832.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,212.20 : 184,818.30 = 81,221.80 : x
  2. Step 2: Convert to fraction form
    123,212.20/184,818.30 = 81,221.80/x
  3. Step 3: Cross multiply
    123,212.20x = 184,818.30 × 81,221.80
  4. Step 4: Simplify right side
    123,212.20x = 15,011,274,998.94
  5. Step 5: Solve for x
    x = 15,011,274,998.94/123,212.20
  6. Step 6: Final answer
    x = 121,832.70

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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.