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Finding the Fourth Proportional to 133,080.80, 199,621.20 and 66,531.20

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Solution

The fourth proportional to 133,080.80, 199,621.20 and 66,531.20 is: 99,796.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,080.80 : 199,621.20 = 66,531.20 : x
  2. Step 2: Convert to fraction form
    133,080.80/199,621.20 = 66,531.20/x
  3. Step 3: Cross multiply
    133,080.80x = 199,621.20 × 66,531.20
  4. Step 4: Simplify right side
    133,080.80x = 13,281,037,981.44
  5. Step 5: Solve for x
    x = 13,281,037,981.44/133,080.80
  6. Step 6: Final answer
    x = 99,796.80

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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.