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Finding the Fourth Proportional to 67,854.84, 101,793.24 and 21,118.56

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Solution

The fourth proportional to 67,854.84, 101,793.24 and 21,118.56 is: 31,681.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,854.84 : 101,793.24 = 21,118.56 : x
  2. Step 2: Convert to fraction form
    67,854.84/101,793.24 = 21,118.56/x
  3. Step 3: Cross multiply
    67,854.84x = 101,793.24 × 21,118.56
  4. Step 4: Simplify right side
    67,854.84x = 2,149,726,646.53
  5. Step 5: Solve for x
    x = 2,149,726,646.53/67,854.84
  6. Step 6: Final answer
    x = 31,681.26

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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.