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Finding the Fourth Proportional to 66,900.98, 100,351.47 and 20,153.86

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Solution

The fourth proportional to 66,900.98, 100,351.47 and 20,153.86 is: 30,230.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,900.98 : 100,351.47 = 20,153.86 : x
  2. Step 2: Convert to fraction form
    66,900.98/100,351.47 = 20,153.86/x
  3. Step 3: Cross multiply
    66,900.98x = 100,351.47 × 20,153.86
  4. Step 4: Simplify right side
    66,900.98x = 2,022,469,477.17
  5. Step 5: Solve for x
    x = 2,022,469,477.17/66,900.98
  6. Step 6: Final answer
    x = 30,230.79

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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.