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Finding the Fourth Proportional to 118,076.80, 177,115.20 and 106,412.80

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Solution

The fourth proportional to 118,076.80, 177,115.20 and 106,412.80 is: 159,619.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,076.80 : 177,115.20 = 106,412.80 : x
  2. Step 2: Convert to fraction form
    118,076.80/177,115.20 = 106,412.80/x
  3. Step 3: Cross multiply
    118,076.80x = 177,115.20 × 106,412.80
  4. Step 4: Simplify right side
    118,076.80x = 18,847,324,354.56
  5. Step 5: Solve for x
    x = 18,847,324,354.56/118,076.80
  6. Step 6: Final answer
    x = 159,619.20

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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.