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Finding the Fourth Proportional to 40,811.20, 61,230.03 and 20,020.12

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Solution

The fourth proportional to 40,811.20, 61,230.03 and 20,020.12 is: 30,036.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,811.20 : 61,230.03 = 20,020.12 : x
  2. Step 2: Convert to fraction form
    40,811.20/61,230.03 = 20,020.12/x
  3. Step 3: Cross multiply
    40,811.20x = 61,230.03 × 20,020.12
  4. Step 4: Simplify right side
    40,811.20x = 1,225,832,320.05
  5. Step 5: Solve for x
    x = 1,225,832,320.05/40,811.20
  6. Step 6: Final answer
    x = 30,036.67

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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.