Home / 278,718,921.72-418,051,367.40-84,632,042.88

Finding the Fourth Proportional to 278,718,921.72, 418,051,367.40 and 84,632,042.88

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Solution

The fourth proportional to 278,718,921.72, 418,051,367.40 and 84,632,042.88 is: 126,939,861.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,718,921.72 : 418,051,367.40 = 84,632,042.88 : x
  2. Step 2: Convert to fraction form
    278,718,921.72/418,051,367.40 = 84,632,042.88/x
  3. Step 3: Cross multiply
    278,718,921.72x = 418,051,367.40 × 84,632,042.88
  4. Step 4: Simplify right side
    278,718,921.72x = 35,380,541,251,839,432
  5. Step 5: Solve for x
    x = 35,380,541,251,839,432/278,718,921.72
  6. Step 6: Final answer
    x = 126,939,861.25

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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.