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Finding the Fourth Proportional to 229,912.20, 344,879.10 and 72,145.80

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Solution

The fourth proportional to 229,912.20, 344,879.10 and 72,145.80 is: 108,222.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,912.20 : 344,879.10 = 72,145.80 : x
  2. Step 2: Convert to fraction form
    229,912.20/344,879.10 = 72,145.80/x
  3. Step 3: Cross multiply
    229,912.20x = 344,879.10 × 72,145.80
  4. Step 4: Simplify right side
    229,912.20x = 24,881,578,572.78
  5. Step 5: Solve for x
    x = 24,881,578,572.78/229,912.20
  6. Step 6: Final answer
    x = 108,222.09

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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.