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Finding the Fourth Proportional to 66,163.80, 99,245.70 and 36,639.30

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Solution

The fourth proportional to 66,163.80, 99,245.70 and 36,639.30 is: 54,958.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,163.80 : 99,245.70 = 36,639.30 : x
  2. Step 2: Convert to fraction form
    66,163.80/99,245.70 = 36,639.30/x
  3. Step 3: Cross multiply
    66,163.80x = 99,245.70 × 36,639.30
  4. Step 4: Simplify right side
    66,163.80x = 3,636,292,976.01
  5. Step 5: Solve for x
    x = 3,636,292,976.01/66,163.80
  6. Step 6: Final answer
    x = 54,958.95

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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.