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Finding the Fourth Proportional to 278,770.59, 418,171.77 and 79,075.35

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Solution

The fourth proportional to 278,770.59, 418,171.77 and 79,075.35 is: 118,617.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,770.59 : 418,171.77 = 79,075.35 : x
  2. Step 2: Convert to fraction form
    278,770.59/418,171.77 = 79,075.35/x
  3. Step 3: Cross multiply
    278,770.59x = 418,171.77 × 79,075.35
  4. Step 4: Simplify right side
    278,770.59x = 33,067,079,072.87
  5. Step 5: Solve for x
    x = 33,067,079,072.87/278,770.59
  6. Step 6: Final answer
    x = 118,617.53

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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.