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Finding the Fourth Proportional to 83,690.88, 125,540.64 and 21,361.92

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Solution

The fourth proportional to 83,690.88, 125,540.64 and 21,361.92 is: 32,043.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,690.88 : 125,540.64 = 21,361.92 : x
  2. Step 2: Convert to fraction form
    83,690.88/125,540.64 = 21,361.92/x
  3. Step 3: Cross multiply
    83,690.88x = 125,540.64 × 21,361.92
  4. Step 4: Simplify right side
    83,690.88x = 2,681,789,108.43
  5. Step 5: Solve for x
    x = 2,681,789,108.43/83,690.88
  6. Step 6: Final answer
    x = 32,043.98

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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.