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Finding the Fourth Proportional to 115,891.20, 173,836.80 and 100,684.80

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Solution

The fourth proportional to 115,891.20, 173,836.80 and 100,684.80 is: 151,027.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,891.20 : 173,836.80 = 100,684.80 : x
  2. Step 2: Convert to fraction form
    115,891.20/173,836.80 = 100,684.80/x
  3. Step 3: Cross multiply
    115,891.20x = 173,836.80 × 100,684.80
  4. Step 4: Simplify right side
    115,891.20x = 17,502,723,440.64
  5. Step 5: Solve for x
    x = 17,502,723,440.64/115,891.20
  6. Step 6: Final answer
    x = 151,027.20

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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.