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Finding the Fourth Proportional to 125,940.30, 188,910.45 and 109,537.80

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Solution

The fourth proportional to 125,940.30, 188,910.45 and 109,537.80 is: 164,306.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,940.30 : 188,910.45 = 109,537.80 : x
  2. Step 2: Convert to fraction form
    125,940.30/188,910.45 = 109,537.80/x
  3. Step 3: Cross multiply
    125,940.30x = 188,910.45 × 109,537.80
  4. Step 4: Simplify right side
    125,940.30x = 20,692,835,090.01
  5. Step 5: Solve for x
    x = 20,692,835,090.01/125,940.30
  6. Step 6: Final answer
    x = 164,306.70

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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.