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Finding the Fourth Proportional to 66,081.47, 91,189.99 and 35,866.15

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Solution

The fourth proportional to 66,081.47, 91,189.99 and 35,866.15 is: 49,493.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,081.47 : 91,189.99 = 35,866.15 : x
  2. Step 2: Convert to fraction form
    66,081.47/91,189.99 = 35,866.15/x
  3. Step 3: Cross multiply
    66,081.47x = 91,189.99 × 35,866.15
  4. Step 4: Simplify right side
    66,081.47x = 3,270,633,859.84
  5. Step 5: Solve for x
    x = 3,270,633,859.84/66,081.47
  6. Step 6: Final answer
    x = 49,493.96

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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.