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Finding the Fourth Proportional to 66,221.52, 99,348.84 and 21,850.80

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Solution

The fourth proportional to 66,221.52, 99,348.84 and 21,850.80 is: 32,781.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,221.52 : 99,348.84 = 21,850.80 : x
  2. Step 2: Convert to fraction form
    66,221.52/99,348.84 = 21,850.80/x
  3. Step 3: Cross multiply
    66,221.52x = 99,348.84 × 21,850.80
  4. Step 4: Simplify right side
    66,221.52x = 2,170,851,633.07
  5. Step 5: Solve for x
    x = 2,170,851,633.07/66,221.52
  6. Step 6: Final answer
    x = 32,781.66

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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.