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Finding the Fourth Proportional to 66,195.11, 91,349.87 and 35,980.50

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Solution

The fourth proportional to 66,195.11, 91,349.87 and 35,980.50 is: 49,653.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,195.11 : 91,349.87 = 35,980.50 : x
  2. Step 2: Convert to fraction form
    66,195.11/91,349.87 = 35,980.50/x
  3. Step 3: Cross multiply
    66,195.11x = 91,349.87 × 35,980.50
  4. Step 4: Simplify right side
    66,195.11x = 3,286,813,997.54
  5. Step 5: Solve for x
    x = 3,286,813,997.54/66,195.11
  6. Step 6: Final answer
    x = 49,653.43

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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.