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Finding the Fourth Proportional to 66,821.80, 100,232.70 and 43,202.20

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Solution

The fourth proportional to 66,821.80, 100,232.70 and 43,202.20 is: 64,803.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,821.80 : 100,232.70 = 43,202.20 : x
  2. Step 2: Convert to fraction form
    66,821.80/100,232.70 = 43,202.20/x
  3. Step 3: Cross multiply
    66,821.80x = 100,232.70 × 43,202.20
  4. Step 4: Simplify right side
    66,821.80x = 4,330,273,151.94
  5. Step 5: Solve for x
    x = 4,330,273,151.94/66,821.80
  6. Step 6: Final answer
    x = 64,803.30

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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.