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Finding the Fourth Proportional to 278,884.84, 418,320.24 and 79,204.72

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Solution

The fourth proportional to 278,884.84, 418,320.24 and 79,204.72 is: 118,805.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,884.84 : 418,320.24 = 79,204.72 : x
  2. Step 2: Convert to fraction form
    278,884.84/418,320.24 = 79,204.72/x
  3. Step 3: Cross multiply
    278,884.84x = 418,320.24 × 79,204.72
  4. Step 4: Simplify right side
    278,884.84x = 33,132,937,479.53
  5. Step 5: Solve for x
    x = 33,132,937,479.53/278,884.84
  6. Step 6: Final answer
    x = 118,805.09

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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.