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Finding the Fourth Proportional to 66,191.21, 91,344.78 and 35,976.51

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Solution

The fourth proportional to 66,191.21, 91,344.78 and 35,976.51 is: 49,648.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,191.21 : 91,344.78 = 35,976.51 : x
  2. Step 2: Convert to fraction form
    66,191.21/91,344.78 = 35,976.51/x
  3. Step 3: Cross multiply
    66,191.21x = 91,344.78 × 35,976.51
  4. Step 4: Simplify right side
    66,191.21x = 3,286,266,391.12
  5. Step 5: Solve for x
    x = 3,286,266,391.12/66,191.21
  6. Step 6: Final answer
    x = 49,648.08

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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.