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Finding the Fourth Proportional to 215,057.28, 322,551.36 and 67,313.28

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Solution

The fourth proportional to 215,057.28, 322,551.36 and 67,313.28 is: 100,959.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,057.28 : 322,551.36 = 67,313.28 : x
  2. Step 2: Convert to fraction form
    215,057.28/322,551.36 = 67,313.28/x
  3. Step 3: Cross multiply
    215,057.28x = 322,551.36 × 67,313.28
  4. Step 4: Simplify right side
    215,057.28x = 21,711,990,010.06
  5. Step 5: Solve for x
    x = 21,711,990,010.06/215,057.28
  6. Step 6: Final answer
    x = 100,959.10

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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.