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Finding the Fourth Proportional to 109,052.78, 150,495.21 and 66,634.70

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Solution

The fourth proportional to 109,052.78, 150,495.21 and 66,634.70 is: 91,957.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,052.78 : 150,495.21 = 66,634.70 : x
  2. Step 2: Convert to fraction form
    109,052.78/150,495.21 = 66,634.70/x
  3. Step 3: Cross multiply
    109,052.78x = 150,495.21 × 66,634.70
  4. Step 4: Simplify right side
    109,052.78x = 10,028,203,169.79
  5. Step 5: Solve for x
    x = 10,028,203,169.79/109,052.78
  6. Step 6: Final answer
    x = 91,957.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.