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Finding the Fourth Proportional to 66,956.52, 100,451.02 and 20,206.60

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Solution

The fourth proportional to 66,956.52, 100,451.02 and 20,206.60 is: 30,314.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,956.52 : 100,451.02 = 20,206.60 : x
  2. Step 2: Convert to fraction form
    66,956.52/100,451.02 = 20,206.60/x
  3. Step 3: Cross multiply
    66,956.52x = 100,451.02 × 20,206.60
  4. Step 4: Simplify right side
    66,956.52x = 2,029,773,580.73
  5. Step 5: Solve for x
    x = 2,029,773,580.73/66,956.52
  6. Step 6: Final answer
    x = 30,314.80

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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.