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Finding the Fourth Proportional to 166,013.20, 248,722.80 and 100,979.20

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Solution

The fourth proportional to 166,013.20, 248,722.80 and 100,979.20 is: 151,288.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,013.20 : 248,722.80 = 100,979.20 : x
  2. Step 2: Convert to fraction form
    166,013.20/248,722.80 = 100,979.20/x
  3. Step 3: Cross multiply
    166,013.20x = 248,722.80 × 100,979.20
  4. Step 4: Simplify right side
    166,013.20x = 25,115,829,365.76
  5. Step 5: Solve for x
    x = 25,115,829,365.76/166,013.20
  6. Step 6: Final answer
    x = 151,288.15

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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.