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Finding the Fourth Proportional to 279,135.84, 418,640.40 and 79,452

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Solution

The fourth proportional to 279,135.84, 418,640.40 and 79,452 is: 119,159.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,135.84 : 418,640.40 = 79,452 : x
  2. Step 2: Convert to fraction form
    279,135.84/418,640.40 = 79,452/x
  3. Step 3: Cross multiply
    279,135.84x = 418,640.40 × 79,452
  4. Step 4: Simplify right side
    279,135.84x = 33,261,817,060.80
  5. Step 5: Solve for x
    x = 33,261,817,060.80/279,135.84
  6. Step 6: Final answer
    x = 119,159.97

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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.