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Finding the Fourth Proportional to 100,672.15, 150,844.20 and 74,100.10

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Solution

The fourth proportional to 100,672.15, 150,844.20 and 74,100.10 is: 111,029.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,672.15 : 150,844.20 = 74,100.10 : x
  2. Step 2: Convert to fraction form
    100,672.15/150,844.20 = 74,100.10/x
  3. Step 3: Cross multiply
    100,672.15x = 150,844.20 × 74,100.10
  4. Step 4: Simplify right side
    100,672.15x = 11,177,570,304.42
  5. Step 5: Solve for x
    x = 11,177,570,304.42/100,672.15
  6. Step 6: Final answer
    x = 111,029.42

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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.