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Finding the Fourth Proportional to 149,028.66, 205,655.49 and 81,960.66

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Solution

The fourth proportional to 149,028.66, 205,655.49 and 81,960.66 is: 113,103.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,028.66 : 205,655.49 = 81,960.66 : x
  2. Step 2: Convert to fraction form
    149,028.66/205,655.49 = 81,960.66/x
  3. Step 3: Cross multiply
    149,028.66x = 205,655.49 × 81,960.66
  4. Step 4: Simplify right side
    149,028.66x = 16,855,659,693.02
  5. Step 5: Solve for x
    x = 16,855,659,693.02/149,028.66
  6. Step 6: Final answer
    x = 113,103.48

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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.