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Finding the Fourth Proportional to 66,468.60, 99,761.22 and 36,919.80

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Solution

The fourth proportional to 66,468.60, 99,761.22 and 36,919.80 is: 55,412.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,468.60 : 99,761.22 = 36,919.80 : x
  2. Step 2: Convert to fraction form
    66,468.60/99,761.22 = 36,919.80/x
  3. Step 3: Cross multiply
    66,468.60x = 99,761.22 × 36,919.80
  4. Step 4: Simplify right side
    66,468.60x = 3,683,164,290.16
  5. Step 5: Solve for x
    x = 3,683,164,290.16/66,468.60
  6. Step 6: Final answer
    x = 55,412.09

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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.