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Finding the Fourth Proportional to 217,009.28, 325,564.68 and 67,241.72

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Solution

The fourth proportional to 217,009.28, 325,564.68 and 67,241.72 is: 100,878.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,009.28 : 325,564.68 = 67,241.72 : x
  2. Step 2: Convert to fraction form
    217,009.28/325,564.68 = 67,241.72/x
  3. Step 3: Cross multiply
    217,009.28x = 325,564.68 × 67,241.72
  4. Step 4: Simplify right side
    217,009.28x = 21,891,529,054.45
  5. Step 5: Solve for x
    x = 21,891,529,054.45/217,009.28
  6. Step 6: Final answer
    x = 100,878.31

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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.