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Finding the Fourth Proportional to 67,753.12, 101,644.80 and 21,006.40

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Solution

The fourth proportional to 67,753.12, 101,644.80 and 21,006.40 is: 31,514.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,753.12 : 101,644.80 = 21,006.40 : x
  2. Step 2: Convert to fraction form
    67,753.12/101,644.80 = 21,006.40/x
  3. Step 3: Cross multiply
    67,753.12x = 101,644.80 × 21,006.40
  4. Step 4: Simplify right side
    67,753.12x = 2,135,191,326.72
  5. Step 5: Solve for x
    x = 2,135,191,326.72/67,753.12
  6. Step 6: Final answer
    x = 31,514.29

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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.