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Finding the Fourth Proportional to 278,836.49, 418,253.86 and 79,157.01

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Solution

The fourth proportional to 278,836.49, 418,253.86 and 79,157.01 is: 118,735.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,836.49 : 418,253.86 = 79,157.01 : x
  2. Step 2: Convert to fraction form
    278,836.49/418,253.86 = 79,157.01/x
  3. Step 3: Cross multiply
    278,836.49x = 418,253.86 × 79,157.01
  4. Step 4: Simplify right side
    278,836.49x = 33,107,726,645.96
  5. Step 5: Solve for x
    x = 33,107,726,645.96/278,836.49
  6. Step 6: Final answer
    x = 118,735.27

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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.