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Finding the Fourth Proportional to 66,965.16, 100,451.34 and 20,216.82

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Solution

The fourth proportional to 66,965.16, 100,451.34 and 20,216.82 is: 30,326.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,965.16 : 100,451.34 = 20,216.82 : x
  2. Step 2: Convert to fraction form
    66,965.16/100,451.34 = 20,216.82/x
  3. Step 3: Cross multiply
    66,965.16x = 100,451.34 × 20,216.82
  4. Step 4: Simplify right side
    66,965.16x = 2,030,806,659.54
  5. Step 5: Solve for x
    x = 2,030,806,659.54/66,965.16
  6. Step 6: Final answer
    x = 30,326.32

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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.