Home / 278,839.90-418,272.81-91,853.02

Finding the Fourth Proportional to 278,839.90, 418,272.81 and 91,853.02

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Solution

The fourth proportional to 278,839.90, 418,272.81 and 91,853.02 is: 137,783.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,839.90 : 418,272.81 = 91,853.02 : x
  2. Step 2: Convert to fraction form
    278,839.90/418,272.81 = 91,853.02/x
  3. Step 3: Cross multiply
    278,839.90x = 418,272.81 × 91,853.02
  4. Step 4: Simplify right side
    278,839.90x = 38,419,620,782.39
  5. Step 5: Solve for x
    x = 38,419,620,782.39/278,839.90
  6. Step 6: Final answer
    x = 137,783.80

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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.