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Finding the Fourth Proportional to 168,128.56, 232,013.96 and 91,647

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Solution

The fourth proportional to 168,128.56, 232,013.96 and 91,647 is: 126,470.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,128.56 : 232,013.96 = 91,647 : x
  2. Step 2: Convert to fraction form
    168,128.56/232,013.96 = 91,647/x
  3. Step 3: Cross multiply
    168,128.56x = 232,013.96 × 91,647
  4. Step 4: Simplify right side
    168,128.56x = 21,263,383,392.12
  5. Step 5: Solve for x
    x = 21,263,383,392.12/168,128.56
  6. Step 6: Final answer
    x = 126,470.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.