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Finding the Fourth Proportional to 66,618.54, 91,938.83 and 37,939.42

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Solution

The fourth proportional to 66,618.54, 91,938.83 and 37,939.42 is: 52,359.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,618.54 : 91,938.83 = 37,939.42 : x
  2. Step 2: Convert to fraction form
    66,618.54/91,938.83 = 37,939.42/x
  3. Step 3: Cross multiply
    66,618.54x = 91,938.83 × 37,939.42
  4. Step 4: Simplify right side
    66,618.54x = 3,488,105,750.68
  5. Step 5: Solve for x
    x = 3,488,105,750.68/66,618.54
  6. Step 6: Final answer
    x = 52,359.38

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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.