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Finding the Fourth Proportional to 253,057.80, 379,586.70 and 66,069.30

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Solution

The fourth proportional to 253,057.80, 379,586.70 and 66,069.30 is: 99,103.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,057.80 : 379,586.70 = 66,069.30 : x
  2. Step 2: Convert to fraction form
    253,057.80/379,586.70 = 66,069.30/x
  3. Step 3: Cross multiply
    253,057.80x = 379,586.70 × 66,069.30
  4. Step 4: Simplify right side
    253,057.80x = 25,079,027,558.31
  5. Step 5: Solve for x
    x = 25,079,027,558.31/253,057.80
  6. Step 6: Final answer
    x = 99,103.95

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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.