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Finding the Fourth Proportional to 143,911.81, 198,598.48 and 79,379.60

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Solution

The fourth proportional to 143,911.81, 198,598.48 and 79,379.60 is: 109,543.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,911.81 : 198,598.48 = 79,379.60 : x
  2. Step 2: Convert to fraction form
    143,911.81/198,598.48 = 79,379.60/x
  3. Step 3: Cross multiply
    143,911.81x = 198,598.48 × 79,379.60
  4. Step 4: Simplify right side
    143,911.81x = 15,764,667,158.08
  5. Step 5: Solve for x
    x = 15,764,667,158.08/143,911.81
  6. Step 6: Final answer
    x = 109,543.95

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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.