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Finding the Fourth Proportional to 45,358.68, 67,939.56 and 21,936

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Solution

The fourth proportional to 45,358.68, 67,939.56 and 21,936 is: 32,856.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,358.68 : 67,939.56 = 21,936 : x
  2. Step 2: Convert to fraction form
    45,358.68/67,939.56 = 21,936/x
  3. Step 3: Cross multiply
    45,358.68x = 67,939.56 × 21,936
  4. Step 4: Simplify right side
    45,358.68x = 1,490,322,188.16
  5. Step 5: Solve for x
    x = 1,490,322,188.16/45,358.68
  6. Step 6: Final answer
    x = 32,856.38

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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.