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Finding the Fourth Proportional to 117,768.80, 176,458.80 and 100,272.80

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Solution

The fourth proportional to 117,768.80, 176,458.80 and 100,272.80 is: 150,243.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,768.80 : 176,458.80 = 100,272.80 : x
  2. Step 2: Convert to fraction form
    117,768.80/176,458.80 = 100,272.80/x
  3. Step 3: Cross multiply
    117,768.80x = 176,458.80 × 100,272.80
  4. Step 4: Simplify right side
    117,768.80x = 17,694,017,960.64
  5. Step 5: Solve for x
    x = 17,694,017,960.64/117,768.80
  6. Step 6: Final answer
    x = 150,243.68

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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.