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Finding the Fourth Proportional to 200,529.20, 300,793.80 and 89,721.20

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Solution

The fourth proportional to 200,529.20, 300,793.80 and 89,721.20 is: 134,581.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,529.20 : 300,793.80 = 89,721.20 : x
  2. Step 2: Convert to fraction form
    200,529.20/300,793.80 = 89,721.20/x
  3. Step 3: Cross multiply
    200,529.20x = 300,793.80 × 89,721.20
  4. Step 4: Simplify right side
    200,529.20x = 26,987,580,688.56
  5. Step 5: Solve for x
    x = 26,987,580,688.56/200,529.20
  6. Step 6: Final answer
    x = 134,581.80

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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.