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Finding the Fourth Proportional to 278,775.09, 418,178.52 and 79,079.85

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Solution

The fourth proportional to 278,775.09, 418,178.52 and 79,079.85 is: 118,624.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,775.09 : 418,178.52 = 79,079.85 : x
  2. Step 2: Convert to fraction form
    278,775.09/418,178.52 = 79,079.85/x
  3. Step 3: Cross multiply
    278,775.09x = 418,178.52 × 79,079.85
  4. Step 4: Simplify right side
    278,775.09x = 33,069,494,634.82
  5. Step 5: Solve for x
    x = 33,069,494,634.82/278,775.09
  6. Step 6: Final answer
    x = 118,624.28

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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.