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Finding the Fourth Proportional to 172,928.75, 238,752.72 and 108,486.32

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Solution

The fourth proportional to 172,928.75, 238,752.72 and 108,486.32 is: 149,780.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,928.75 : 238,752.72 = 108,486.32 : x
  2. Step 2: Convert to fraction form
    172,928.75/238,752.72 = 108,486.32/x
  3. Step 3: Cross multiply
    172,928.75x = 238,752.72 × 108,486.32
  4. Step 4: Simplify right side
    172,928.75x = 25,901,402,789.03
  5. Step 5: Solve for x
    x = 25,901,402,789.03/172,928.75
  6. Step 6: Final answer
    x = 149,780.78

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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.