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Finding the Fourth Proportional to 273,092.80, 409,639.20 and 86,123.20

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Solution

The fourth proportional to 273,092.80, 409,639.20 and 86,123.20 is: 129,184.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,092.80 : 409,639.20 = 86,123.20 : x
  2. Step 2: Convert to fraction form
    273,092.80/409,639.20 = 86,123.20/x
  3. Step 3: Cross multiply
    273,092.80x = 409,639.20 × 86,123.20
  4. Step 4: Simplify right side
    273,092.80x = 35,279,438,749.44
  5. Step 5: Solve for x
    x = 35,279,438,749.44/273,092.80
  6. Step 6: Final answer
    x = 129,184.80

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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.