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Finding the Fourth Proportional to 74,540.70, 111,811.05 and 66,246.30

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Solution

The fourth proportional to 74,540.70, 111,811.05 and 66,246.30 is: 99,369.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,540.70 : 111,811.05 = 66,246.30 : x
  2. Step 2: Convert to fraction form
    74,540.70/111,811.05 = 66,246.30/x
  3. Step 3: Cross multiply
    74,540.70x = 111,811.05 × 66,246.30
  4. Step 4: Simplify right side
    74,540.70x = 7,407,068,361.62
  5. Step 5: Solve for x
    x = 7,407,068,361.62/74,540.70
  6. Step 6: Final answer
    x = 99,369.45

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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.