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Finding the Fourth Proportional to 100,392.72, 150,607.50 and 81,837.39

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Solution

The fourth proportional to 100,392.72, 150,607.50 and 81,837.39 is: 122,771.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,392.72 : 150,607.50 = 81,837.39 : x
  2. Step 2: Convert to fraction form
    100,392.72/150,607.50 = 81,837.39/x
  3. Step 3: Cross multiply
    100,392.72x = 150,607.50 × 81,837.39
  4. Step 4: Simplify right side
    100,392.72x = 12,325,324,585.48
  5. Step 5: Solve for x
    x = 12,325,324,585.48/100,392.72
  6. Step 6: Final answer
    x = 122,771.10

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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.