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Finding the Fourth Proportional to 143,668.42, 198,215.85 and 79,993.78

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Solution

The fourth proportional to 143,668.42, 198,215.85 and 79,993.78 is: 110,365.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,668.42 : 198,215.85 = 79,993.78 : x
  2. Step 2: Convert to fraction form
    143,668.42/198,215.85 = 79,993.78/x
  3. Step 3: Cross multiply
    143,668.42x = 198,215.85 × 79,993.78
  4. Step 4: Simplify right side
    143,668.42x = 15,856,035,097.41
  5. Step 5: Solve for x
    x = 15,856,035,097.41/143,668.42
  6. Step 6: Final answer
    x = 110,365.49

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1.5x scale

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.