Home / 81,857.40-112,895.82-48,291

Finding the Fourth Proportional to 81,857.40, 112,895.82 and 48,291

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Solution

The fourth proportional to 81,857.40, 112,895.82 and 48,291 is: 66,601.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,857.40 : 112,895.82 = 48,291 : x
  2. Step 2: Convert to fraction form
    81,857.40/112,895.82 = 48,291/x
  3. Step 3: Cross multiply
    81,857.40x = 112,895.82 × 48,291
  4. Step 4: Simplify right side
    81,857.40x = 5,451,852,043.62
  5. Step 5: Solve for x
    x = 5,451,852,043.62/81,857.40
  6. Step 6: Final answer
    x = 66,601.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.