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Finding the Fourth Proportional to 128,967.67, 192,404.24 and 121,992.31

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Solution

The fourth proportional to 128,967.67, 192,404.24 and 121,992.31 is: 181,997.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,967.67 : 192,404.24 = 121,992.31 : x
  2. Step 2: Convert to fraction form
    128,967.67/192,404.24 = 121,992.31/x
  3. Step 3: Cross multiply
    128,967.67x = 192,404.24 × 121,992.31
  4. Step 4: Simplify right side
    128,967.67x = 23,471,836,729.37
  5. Step 5: Solve for x
    x = 23,471,836,729.37/128,967.67
  6. Step 6: Final answer
    x = 181,997.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.