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Finding the Fourth Proportional to 268,662.39, 402,979.01 and 81,659.31

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Solution

The fourth proportional to 268,662.39, 402,979.01 and 81,659.31 is: 122,484.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,662.39 : 402,979.01 = 81,659.31 : x
  2. Step 2: Convert to fraction form
    268,662.39/402,979.01 = 81,659.31/x
  3. Step 3: Cross multiply
    268,662.39x = 402,979.01 × 81,659.31
  4. Step 4: Simplify right side
    268,662.39x = 32,906,987,901.08
  5. Step 5: Solve for x
    x = 32,906,987,901.08/268,662.39
  6. Step 6: Final answer
    x = 122,484.53

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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.