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Finding the Fourth Proportional to 149,216.79, 205,912.46 and 81,232.03

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Solution

The fourth proportional to 149,216.79, 205,912.46 and 81,232.03 is: 112,096.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,216.79 : 205,912.46 = 81,232.03 : x
  2. Step 2: Convert to fraction form
    149,216.79/205,912.46 = 81,232.03/x
  3. Step 3: Cross multiply
    149,216.79x = 205,912.46 × 81,232.03
  4. Step 4: Simplify right side
    149,216.79x = 16,726,687,588.56
  5. Step 5: Solve for x
    x = 16,726,687,588.56/149,216.79
  6. Step 6: Final answer
    x = 112,096.55

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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.