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Finding the Fourth Proportional to 66,604.80, 99,777.60 and 40,231.20

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Solution

The fourth proportional to 66,604.80, 99,777.60 and 40,231.20 is: 60,268.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,604.80 : 99,777.60 = 40,231.20 : x
  2. Step 2: Convert to fraction form
    66,604.80/99,777.60 = 40,231.20/x
  3. Step 3: Cross multiply
    66,604.80x = 99,777.60 × 40,231.20
  4. Step 4: Simplify right side
    66,604.80x = 4,014,172,581.12
  5. Step 5: Solve for x
    x = 4,014,172,581.12/66,604.80
  6. Step 6: Final answer
    x = 60,268.52

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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.