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Finding the Fourth Proportional to 67,960.72, 101,943.76 and 21,213.58

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Solution

The fourth proportional to 67,960.72, 101,943.76 and 21,213.58 is: 31,821.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,960.72 : 101,943.76 = 21,213.58 : x
  2. Step 2: Convert to fraction form
    67,960.72/101,943.76 = 21,213.58/x
  3. Step 3: Cross multiply
    67,960.72x = 101,943.76 × 21,213.58
  4. Step 4: Simplify right side
    67,960.72x = 2,162,592,108.26
  5. Step 5: Solve for x
    x = 2,162,592,108.26/67,960.72
  6. Step 6: Final answer
    x = 31,821.21

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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.