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Finding the Fourth Proportional to 278,759.80, 418,155.54 and 79,064.38

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Solution

The fourth proportional to 278,759.80, 418,155.54 and 79,064.38 is: 118,601.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,759.80 : 418,155.54 = 79,064.38 : x
  2. Step 2: Convert to fraction form
    278,759.80/418,155.54 = 79,064.38/x
  3. Step 3: Cross multiply
    278,759.80x = 418,155.54 × 79,064.38
  4. Step 4: Simplify right side
    278,759.80x = 33,061,208,513.67
  5. Step 5: Solve for x
    x = 33,061,208,513.67/278,759.80
  6. Step 6: Final answer
    x = 118,601.06

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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.