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Finding the Fourth Proportional to 101,308.32, 151,979.76 and 45,168.80

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Solution

The fourth proportional to 101,308.32, 151,979.76 and 45,168.80 is: 67,760.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,308.32 : 151,979.76 = 45,168.80 : x
  2. Step 2: Convert to fraction form
    101,308.32/151,979.76 = 45,168.80/x
  3. Step 3: Cross multiply
    101,308.32x = 151,979.76 × 45,168.80
  4. Step 4: Simplify right side
    101,308.32x = 6,864,743,383.49
  5. Step 5: Solve for x
    x = 6,864,743,383.49/101,308.32
  6. Step 6: Final answer
    x = 67,760.90

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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.