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Finding the Fourth Proportional to 279,220.78, 418,825.77 and 79,542.46

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Solution

The fourth proportional to 279,220.78, 418,825.77 and 79,542.46 is: 119,312.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,220.78 : 418,825.77 = 79,542.46 : x
  2. Step 2: Convert to fraction form
    279,220.78/418,825.77 = 79,542.46/x
  3. Step 3: Cross multiply
    279,220.78x = 418,825.77 × 79,542.46
  4. Step 4: Simplify right side
    279,220.78x = 33,314,432,057.19
  5. Step 5: Solve for x
    x = 33,314,432,057.19/279,220.78
  6. Step 6: Final answer
    x = 119,312.15

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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.