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Finding the Fourth Proportional to 253,109.70, 379,668.60 and 66,121.20

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Solution

The fourth proportional to 253,109.70, 379,668.60 and 66,121.20 is: 99,182.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,109.70 : 379,668.60 = 66,121.20 : x
  2. Step 2: Convert to fraction form
    253,109.70/379,668.60 = 66,121.20/x
  3. Step 3: Cross multiply
    253,109.70x = 379,668.60 × 66,121.20
  4. Step 4: Simplify right side
    253,109.70x = 25,104,143,434.32
  5. Step 5: Solve for x
    x = 25,104,143,434.32/253,109.70
  6. Step 6: Final answer
    x = 99,182.86

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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.