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Finding the Fourth Proportional to 199,606.90, 299,150.35 and 81,139.86

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Solution

The fourth proportional to 199,606.90, 299,150.35 and 81,139.86 is: 121,604.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,606.90 : 299,150.35 = 81,139.86 : x
  2. Step 2: Convert to fraction form
    199,606.90/299,150.35 = 81,139.86/x
  3. Step 3: Cross multiply
    199,606.90x = 299,150.35 × 81,139.86
  4. Step 4: Simplify right side
    199,606.90x = 24,273,017,517.95
  5. Step 5: Solve for x
    x = 24,273,017,517.95/199,606.90
  6. Step 6: Final answer
    x = 121,604.10

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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.