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Finding the Fourth Proportional to 166,638.39, 250,041.42 and 66,869.88

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Solution

The fourth proportional to 166,638.39, 250,041.42 and 66,869.88 is: 100,338.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,638.39 : 250,041.42 = 66,869.88 : x
  2. Step 2: Convert to fraction form
    166,638.39/250,041.42 = 66,869.88/x
  3. Step 3: Cross multiply
    166,638.39x = 250,041.42 × 66,869.88
  4. Step 4: Simplify right side
    166,638.39x = 16,720,239,750.43
  5. Step 5: Solve for x
    x = 16,720,239,750.43/166,638.39
  6. Step 6: Final answer
    x = 100,338.46

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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.