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Finding the Fourth Proportional to 66,605.57, 99,906.05 and 16,686.10

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Solution

The fourth proportional to 66,605.57, 99,906.05 and 16,686.10 is: 25,028.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,605.57 : 99,906.05 = 16,686.10 : x
  2. Step 2: Convert to fraction form
    66,605.57/99,906.05 = 16,686.10/x
  3. Step 3: Cross multiply
    66,605.57x = 99,906.05 × 16,686.10
  4. Step 4: Simplify right side
    66,605.57x = 1,667,041,757.94
  5. Step 5: Solve for x
    x = 1,667,041,757.94/66,605.57
  6. Step 6: Final answer
    x = 25,028.56

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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.