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Finding the Fourth Proportional to 66,122.80, 91,249.20 and 35,907.88

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Solution

The fourth proportional to 66,122.80, 91,249.20 and 35,907.88 is: 49,552.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,122.80 : 91,249.20 = 35,907.88 : x
  2. Step 2: Convert to fraction form
    66,122.80/91,249.20 = 35,907.88/x
  3. Step 3: Cross multiply
    66,122.80x = 91,249.20 × 35,907.88
  4. Step 4: Simplify right side
    66,122.80x = 3,276,565,323.70
  5. Step 5: Solve for x
    x = 3,276,565,323.70/66,122.80
  6. Step 6: Final answer
    x = 49,552.73

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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.