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Finding the Fourth Proportional to 66,661.38, 91,996.02 and 37,981.44

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Solution

The fourth proportional to 66,661.38, 91,996.02 and 37,981.44 is: 52,416.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,661.38 : 91,996.02 = 37,981.44 : x
  2. Step 2: Convert to fraction form
    66,661.38/91,996.02 = 37,981.44/x
  3. Step 3: Cross multiply
    66,661.38x = 91,996.02 × 37,981.44
  4. Step 4: Simplify right side
    66,661.38x = 3,494,141,313.87
  5. Step 5: Solve for x
    x = 3,494,141,313.87/66,661.38
  6. Step 6: Final answer
    x = 52,416.28

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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.