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Finding the Fourth Proportional to 279,948.80, 419,796.80 and 80,223.52

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Solution

The fourth proportional to 279,948.80, 419,796.80 and 80,223.52 is: 120,299.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,948.80 : 419,796.80 = 80,223.52 : x
  2. Step 2: Convert to fraction form
    279,948.80/419,796.80 = 80,223.52/x
  3. Step 3: Cross multiply
    279,948.80x = 419,796.80 × 80,223.52
  4. Step 4: Simplify right side
    279,948.80x = 33,677,576,980.74
  5. Step 5: Solve for x
    x = 33,677,576,980.74/279,948.80
  6. Step 6: Final answer
    x = 120,299.06

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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.