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Finding the Fourth Proportional to 121,204.60, 181,914.90 and 71,222.20

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Solution

The fourth proportional to 121,204.60, 181,914.90 and 71,222.20 is: 106,896.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,204.60 : 181,914.90 = 71,222.20 : x
  2. Step 2: Convert to fraction form
    121,204.60/181,914.90 = 71,222.20/x
  3. Step 3: Cross multiply
    121,204.60x = 181,914.90 × 71,222.20
  4. Step 4: Simplify right side
    121,204.60x = 12,956,379,390.78
  5. Step 5: Solve for x
    x = 12,956,379,390.78/121,204.60
  6. Step 6: Final answer
    x = 106,896.76

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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.