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Finding the Fourth Proportional to 79,800.36, 119,690.80 and 20,631.08

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Solution

The fourth proportional to 79,800.36, 119,690.80 and 20,631.08 is: 30,944.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,800.36 : 119,690.80 = 20,631.08 : x
  2. Step 2: Convert to fraction form
    79,800.36/119,690.80 = 20,631.08/x
  3. Step 3: Cross multiply
    79,800.36x = 119,690.80 × 20,631.08
  4. Step 4: Simplify right side
    79,800.36x = 2,469,350,470.06
  5. Step 5: Solve for x
    x = 2,469,350,470.06/79,800.36
  6. Step 6: Final answer
    x = 30,944.10

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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.