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Finding the Fourth Proportional to 199,399.28, 299,155.41 and 81,155.48

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Solution

The fourth proportional to 199,399.28, 299,155.41 and 81,155.48 is: 121,756.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,399.28 : 299,155.41 = 81,155.48 : x
  2. Step 2: Convert to fraction form
    199,399.28/299,155.41 = 81,155.48/x
  3. Step 3: Cross multiply
    199,399.28x = 299,155.41 × 81,155.48
  4. Step 4: Simplify right side
    199,399.28x = 24,278,099,397.37
  5. Step 5: Solve for x
    x = 24,278,099,397.37/199,399.28
  6. Step 6: Final answer
    x = 121,756.21

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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.