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Finding the Fourth Proportional to 66,820.38, 100,220.12 and 21,841.40

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Solution

The fourth proportional to 66,820.38, 100,220.12 and 21,841.40 is: 32,758.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,820.38 : 100,220.12 = 21,841.40 : x
  2. Step 2: Convert to fraction form
    66,820.38/100,220.12 = 21,841.40/x
  3. Step 3: Cross multiply
    66,820.38x = 100,220.12 × 21,841.40
  4. Step 4: Simplify right side
    66,820.38x = 2,188,947,388.48
  5. Step 5: Solve for x
    x = 2,188,947,388.48/66,820.38
  6. Step 6: Final answer
    x = 32,758.68

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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.