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Finding the Fourth Proportional to 67,979.98, 101,969.97 and 21,236.50

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Solution

The fourth proportional to 67,979.98, 101,969.97 and 21,236.50 is: 31,854.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,979.98 : 101,969.97 = 21,236.50 : x
  2. Step 2: Convert to fraction form
    67,979.98/101,969.97 = 21,236.50/x
  3. Step 3: Cross multiply
    67,979.98x = 101,969.97 × 21,236.50
  4. Step 4: Simplify right side
    67,979.98x = 2,165,485,267.91
  5. Step 5: Solve for x
    x = 2,165,485,267.91/67,979.98
  6. Step 6: Final answer
    x = 31,854.75

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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.