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Finding the Fourth Proportional to 149,399.96, 206,165.95 and 81,415.49

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Solution

The fourth proportional to 149,399.96, 206,165.95 and 81,415.49 is: 112,350.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,399.96 : 206,165.95 = 81,415.49 : x
  2. Step 2: Convert to fraction form
    149,399.96/206,165.95 = 81,415.49/x
  3. Step 3: Cross multiply
    149,399.96x = 206,165.95 × 81,415.49
  4. Step 4: Simplify right side
    149,399.96x = 16,785,100,606.20
  5. Step 5: Solve for x
    x = 16,785,100,606.20/149,399.96
  6. Step 6: Final answer
    x = 112,350.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.