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Finding the Fourth Proportional to 111,305.80, 166,958.70 and 98,621.20

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Solution

The fourth proportional to 111,305.80, 166,958.70 and 98,621.20 is: 147,931.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,305.80 : 166,958.70 = 98,621.20 : x
  2. Step 2: Convert to fraction form
    111,305.80/166,958.70 = 98,621.20/x
  3. Step 3: Cross multiply
    111,305.80x = 166,958.70 × 98,621.20
  4. Step 4: Simplify right side
    111,305.80x = 16,465,667,344.44
  5. Step 5: Solve for x
    x = 16,465,667,344.44/111,305.80
  6. Step 6: Final answer
    x = 147,931.80

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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.