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Finding the Fourth Proportional to 67,392, 101,083.84 and 20,641.28

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Solution

The fourth proportional to 67,392, 101,083.84 and 20,641.28 is: 30,960.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,392 : 101,083.84 = 20,641.28 : x
  2. Step 2: Convert to fraction form
    67,392/101,083.84 = 20,641.28/x
  3. Step 3: Cross multiply
    67,392x = 101,083.84 × 20,641.28
  4. Step 4: Simplify right side
    67,392x = 2,086,499,844.92
  5. Step 5: Solve for x
    x = 2,086,499,844.92/67,392
  6. Step 6: Final answer
    x = 30,960.65

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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.