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Finding the Fourth Proportional to 279,047.13, 418,640.91 and 79,367.55

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Solution

The fourth proportional to 279,047.13, 418,640.91 and 79,367.55 is: 119,071.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,047.13 : 418,640.91 = 79,367.55 : x
  2. Step 2: Convert to fraction form
    279,047.13/418,640.91 = 79,367.55/x
  3. Step 3: Cross multiply
    279,047.13x = 418,640.91 × 79,367.55
  4. Step 4: Simplify right side
    279,047.13x = 33,226,501,488.94
  5. Step 5: Solve for x
    x = 33,226,501,488.94/279,047.13
  6. Step 6: Final answer
    x = 119,071.29

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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.