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Finding the Fourth Proportional to 253,112.80, 379,672.56 and 75,579.04

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Solution

The fourth proportional to 253,112.80, 379,672.56 and 75,579.04 is: 113,369.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,112.80 : 379,672.56 = 75,579.04 : x
  2. Step 2: Convert to fraction form
    253,112.80/379,672.56 = 75,579.04/x
  3. Step 3: Cross multiply
    253,112.80x = 379,672.56 × 75,579.04
  4. Step 4: Simplify right side
    253,112.80x = 28,695,287,599.14
  5. Step 5: Solve for x
    x = 28,695,287,599.14/253,112.80
  6. Step 6: Final answer
    x = 113,369.56

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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.