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Finding the Fourth Proportional to 66,918.58, 100,290.39 and 50,146.78

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Solution

The fourth proportional to 66,918.58, 100,290.39 and 50,146.78 is: 75,154.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,918.58 : 100,290.39 = 50,146.78 : x
  2. Step 2: Convert to fraction form
    66,918.58/100,290.39 = 50,146.78/x
  3. Step 3: Cross multiply
    66,918.58x = 100,290.39 × 50,146.78
  4. Step 4: Simplify right side
    66,918.58x = 5,029,240,123.44
  5. Step 5: Solve for x
    x = 5,029,240,123.44/66,918.58
  6. Step 6: Final answer
    x = 75,154.62

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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.