Home / 128,469.48-192,999.58-91,121.96

Finding the Fourth Proportional to 128,469.48, 192,999.58 and 91,121.96

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Solution

The fourth proportional to 128,469.48, 192,999.58 and 91,121.96 is: 136,892.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,469.48 : 192,999.58 = 91,121.96 : x
  2. Step 2: Convert to fraction form
    128,469.48/192,999.58 = 91,121.96/x
  3. Step 3: Cross multiply
    128,469.48x = 192,999.58 × 91,121.96
  4. Step 4: Simplify right side
    128,469.48x = 17,586,500,008.78
  5. Step 5: Solve for x
    x = 17,586,500,008.78/128,469.48
  6. Step 6: Final answer
    x = 136,892.44

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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.