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Finding the Fourth Proportional to 278,871.35, 418,014.62 and 136,520.33

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Solution

The fourth proportional to 278,871.35, 418,014.62 and 136,520.33 is: 204,637.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,871.35 : 418,014.62 = 136,520.33 : x
  2. Step 2: Convert to fraction form
    278,871.35/418,014.62 = 136,520.33/x
  3. Step 3: Cross multiply
    278,871.35x = 418,014.62 × 136,520.33
  4. Step 4: Simplify right side
    278,871.35x = 57,067,493,184.62
  5. Step 5: Solve for x
    x = 57,067,493,184.62/278,871.35
  6. Step 6: Final answer
    x = 204,637.35

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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.