Home / 278,610.23-417,975.35-86,480.66

Finding the Fourth Proportional to 278,610.23, 417,975.35 and 86,480.66

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Solution

The fourth proportional to 278,610.23, 417,975.35 and 86,480.66 is: 129,739.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,610.23 : 417,975.35 = 86,480.66 : x
  2. Step 2: Convert to fraction form
    278,610.23/417,975.35 = 86,480.66/x
  3. Step 3: Cross multiply
    278,610.23x = 417,975.35 × 86,480.66
  4. Step 4: Simplify right side
    278,610.23x = 36,146,784,131.73
  5. Step 5: Solve for x
    x = 36,146,784,131.73/278,610.23
  6. Step 6: Final answer
    x = 129,739.62

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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.