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Finding the Fourth Proportional to 188,918.52, 260,687.70 and 107,220.80

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Solution

The fourth proportional to 188,918.52, 260,687.70 and 107,220.80 is: 147,953.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,918.52 : 260,687.70 = 107,220.80 : x
  2. Step 2: Convert to fraction form
    188,918.52/260,687.70 = 107,220.80/x
  3. Step 3: Cross multiply
    188,918.52x = 260,687.70 × 107,220.80
  4. Step 4: Simplify right side
    188,918.52x = 27,951,142,440.72
  5. Step 5: Solve for x
    x = 27,951,142,440.72/188,918.52
  6. Step 6: Final answer
    x = 147,953.43

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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.