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Finding the Fourth Proportional to 67,959.88, 101,936.22 and 21,207.40

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Solution

The fourth proportional to 67,959.88, 101,936.22 and 21,207.40 is: 31,809.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,959.88 : 101,936.22 = 21,207.40 : x
  2. Step 2: Convert to fraction form
    67,959.88/101,936.22 = 21,207.40/x
  3. Step 3: Cross multiply
    67,959.88x = 101,936.22 × 21,207.40
  4. Step 4: Simplify right side
    67,959.88x = 2,161,802,192.03
  5. Step 5: Solve for x
    x = 2,161,802,192.03/67,959.88
  6. Step 6: Final answer
    x = 31,809.98

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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.