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Finding the Fourth Proportional to 215,359.50, 323,052.21 and 67,615.50

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Solution

The fourth proportional to 215,359.50, 323,052.21 and 67,615.50 is: 101,427.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,359.50 : 323,052.21 = 67,615.50 : x
  2. Step 2: Convert to fraction form
    215,359.50/323,052.21 = 67,615.50/x
  3. Step 3: Cross multiply
    215,359.50x = 323,052.21 × 67,615.50
  4. Step 4: Simplify right side
    215,359.50x = 21,843,336,705.26
  5. Step 5: Solve for x
    x = 21,843,336,705.26/215,359.50
  6. Step 6: Final answer
    x = 101,427.32

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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.