Home / 278,821.14-418,247.55-79,125.72

Finding the Fourth Proportional to 278,821.14, 418,247.55 and 79,125.72

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Solution

The fourth proportional to 278,821.14, 418,247.55 and 79,125.72 is: 118,693.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,821.14 : 418,247.55 = 79,125.72 : x
  2. Step 2: Convert to fraction form
    278,821.14/418,247.55 = 79,125.72/x
  3. Step 3: Cross multiply
    278,821.14x = 418,247.55 × 79,125.72
  4. Step 4: Simplify right side
    278,821.14x = 33,094,138,531.99
  5. Step 5: Solve for x
    x = 33,094,138,531.99/278,821.14
  6. Step 6: Final answer
    x = 118,693.08

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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.