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Finding the Fourth Proportional to 67,911.30, 101,876.66 and 21,167.82

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Solution

The fourth proportional to 67,911.30, 101,876.66 and 21,167.82 is: 31,754.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,911.30 : 101,876.66 = 21,167.82 : x
  2. Step 2: Convert to fraction form
    67,911.30/101,876.66 = 21,167.82/x
  3. Step 3: Cross multiply
    67,911.30x = 101,876.66 × 21,167.82
  4. Step 4: Simplify right side
    67,911.30x = 2,156,506,695.24
  5. Step 5: Solve for x
    x = 2,156,506,695.24/67,911.30
  6. Step 6: Final answer
    x = 31,754.76

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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.