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Finding the Fourth Proportional to 143,505.92, 198,047.64 and 79,843.86

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Solution

The fourth proportional to 143,505.92, 198,047.64 and 79,843.86 is: 110,189.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,505.92 : 198,047.64 = 79,843.86 : x
  2. Step 2: Convert to fraction form
    143,505.92/198,047.64 = 79,843.86/x
  3. Step 3: Cross multiply
    143,505.92x = 198,047.64 × 79,843.86
  4. Step 4: Simplify right side
    143,505.92x = 15,812,888,041.49
  5. Step 5: Solve for x
    x = 15,812,888,041.49/143,505.92
  6. Step 6: Final answer
    x = 110,189.80

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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.