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Finding the Fourth Proportional to 279,402.72, 419,169.12 and 79,725.84

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Solution

The fourth proportional to 279,402.72, 419,169.12 and 79,725.84 is: 119,607.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,402.72 : 419,169.12 = 79,725.84 : x
  2. Step 2: Convert to fraction form
    279,402.72/419,169.12 = 79,725.84/x
  3. Step 3: Cross multiply
    279,402.72x = 419,169.12 × 79,725.84
  4. Step 4: Simplify right side
    279,402.72x = 33,418,610,194.06
  5. Step 5: Solve for x
    x = 33,418,610,194.06/279,402.72
  6. Step 6: Final answer
    x = 119,607.32

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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.