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Finding the Fourth Proportional to 132,137.80, 197,801.70 and 72,791.80

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Solution

The fourth proportional to 132,137.80, 197,801.70 and 72,791.80 is: 108,964.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,137.80 : 197,801.70 = 72,791.80 : x
  2. Step 2: Convert to fraction form
    132,137.80/197,801.70 = 72,791.80/x
  3. Step 3: Cross multiply
    132,137.80x = 197,801.70 × 72,791.80
  4. Step 4: Simplify right side
    132,137.80x = 14,398,341,786.06
  5. Step 5: Solve for x
    x = 14,398,341,786.06/132,137.80
  6. Step 6: Final answer
    x = 108,964.59

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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.