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Finding the Fourth Proportional to 143,331.57, 197,804.58 and 79,668

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Solution

The fourth proportional to 143,331.57, 197,804.58 and 79,668 is: 109,945.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,331.57 : 197,804.58 = 79,668 : x
  2. Step 2: Convert to fraction form
    143,331.57/197,804.58 = 79,668/x
  3. Step 3: Cross multiply
    143,331.57x = 197,804.58 × 79,668
  4. Step 4: Simplify right side
    143,331.57x = 15,758,695,279.44
  5. Step 5: Solve for x
    x = 15,758,695,279.44/143,331.57
  6. Step 6: Final answer
    x = 109,945.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.