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Finding the Fourth Proportional to 66,970.80, 100,431.90 and 33,679.80

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Solution

The fourth proportional to 66,970.80, 100,431.90 and 33,679.80 is: 50,507.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,970.80 : 100,431.90 = 33,679.80 : x
  2. Step 2: Convert to fraction form
    66,970.80/100,431.90 = 33,679.80/x
  3. Step 3: Cross multiply
    66,970.80x = 100,431.90 × 33,679.80
  4. Step 4: Simplify right side
    66,970.80x = 3,382,526,305.62
  5. Step 5: Solve for x
    x = 3,382,526,305.62/66,970.80
  6. Step 6: Final answer
    x = 50,507.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.