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Finding the Fourth Proportional to 67,963.98, 101,945.97 and 21,220.86

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Solution

The fourth proportional to 67,963.98, 101,945.97 and 21,220.86 is: 31,831.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,963.98 : 101,945.97 = 21,220.86 : x
  2. Step 2: Convert to fraction form
    67,963.98/101,945.97 = 21,220.86/x
  3. Step 3: Cross multiply
    67,963.98x = 101,945.97 × 21,220.86
  4. Step 4: Simplify right side
    67,963.98x = 2,163,381,156.93
  5. Step 5: Solve for x
    x = 2,163,381,156.93/67,963.98
  6. Step 6: Final answer
    x = 31,831.29

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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.