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Finding the Fourth Proportional to 66,081.21, 91,192.79 and 35,866.80

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Solution

The fourth proportional to 66,081.21, 91,192.79 and 35,866.80 is: 49,496.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,081.21 : 91,192.79 = 35,866.80 : x
  2. Step 2: Convert to fraction form
    66,081.21/91,192.79 = 35,866.80/x
  3. Step 3: Cross multiply
    66,081.21x = 91,192.79 × 35,866.80
  4. Step 4: Simplify right side
    66,081.21x = 3,270,793,381.04
  5. Step 5: Solve for x
    x = 3,270,793,381.04/66,081.21
  6. Step 6: Final answer
    x = 49,496.57

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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.