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Finding the Fourth Proportional to 78,361.44, 117,551.52 and 36,798.72

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Solution

The fourth proportional to 78,361.44, 117,551.52 and 36,798.72 is: 55,202.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,361.44 : 117,551.52 = 36,798.72 : x
  2. Step 2: Convert to fraction form
    78,361.44/117,551.52 = 36,798.72/x
  3. Step 3: Cross multiply
    78,361.44x = 117,551.52 × 36,798.72
  4. Step 4: Simplify right side
    78,361.44x = 4,325,745,470.05
  5. Step 5: Solve for x
    x = 4,325,745,470.05/78,361.44
  6. Step 6: Final answer
    x = 55,202.48

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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.