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Finding the Fourth Proportional to 40,007.20, 60,048.47 and 20,299.90

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Solution

The fourth proportional to 40,007.20, 60,048.47 and 20,299.90 is: 30,468.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,007.20 : 60,048.47 = 20,299.90 : x
  2. Step 2: Convert to fraction form
    40,007.20/60,048.47 = 20,299.90/x
  3. Step 3: Cross multiply
    40,007.20x = 60,048.47 × 20,299.90
  4. Step 4: Simplify right side
    40,007.20x = 1,218,977,947.78
  5. Step 5: Solve for x
    x = 1,218,977,947.78/40,007.20
  6. Step 6: Final answer
    x = 30,468.96

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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.