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Finding the Fourth Proportional to 66,938.81, 92,375.03 and 38,660.09

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Solution

The fourth proportional to 66,938.81, 92,375.03 and 38,660.09 is: 53,350.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,938.81 : 92,375.03 = 38,660.09 : x
  2. Step 2: Convert to fraction form
    66,938.81/92,375.03 = 38,660.09/x
  3. Step 3: Cross multiply
    66,938.81x = 92,375.03 × 38,660.09
  4. Step 4: Simplify right side
    66,938.81x = 3,571,226,608.33
  5. Step 5: Solve for x
    x = 3,571,226,608.33/66,938.81
  6. Step 6: Final answer
    x = 53,350.62

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1.5x scale

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.