Home / 278,822.80-418,234.20-79,123.60

Finding the Fourth Proportional to 278,822.80, 418,234.20 and 79,123.60

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Solution

The fourth proportional to 278,822.80, 418,234.20 and 79,123.60 is: 118,685.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,822.80 : 418,234.20 = 79,123.60 : x
  2. Step 2: Convert to fraction form
    278,822.80/418,234.20 = 79,123.60/x
  3. Step 3: Cross multiply
    278,822.80x = 418,234.20 × 79,123.60
  4. Step 4: Simplify right side
    278,822.80x = 33,092,195,547.12
  5. Step 5: Solve for x
    x = 33,092,195,547.12/278,822.80
  6. Step 6: Final answer
    x = 118,685.40

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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.