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Finding the Fourth Proportional to 128,558.31, 192,837.48 and 44,342.61

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Solution

The fourth proportional to 128,558.31, 192,837.48 and 44,342.61 is: 66,513.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,558.31 : 192,837.48 = 44,342.61 : x
  2. Step 2: Convert to fraction form
    128,558.31/192,837.48 = 44,342.61/x
  3. Step 3: Cross multiply
    128,558.31x = 192,837.48 × 44,342.61
  4. Step 4: Simplify right side
    128,558.31x = 8,550,917,169.02
  5. Step 5: Solve for x
    x = 8,550,917,169.02/128,558.31
  6. Step 6: Final answer
    x = 66,513.92

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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.