Home / 81,835.12-112,905.31-66,701.75

Finding the Fourth Proportional to 81,835.12, 112,905.31 and 66,701.75

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Solution

The fourth proportional to 81,835.12, 112,905.31 and 66,701.75 is: 92,026.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,835.12 : 112,905.31 = 66,701.75 : x
  2. Step 2: Convert to fraction form
    81,835.12/112,905.31 = 66,701.75/x
  3. Step 3: Cross multiply
    81,835.12x = 112,905.31 × 66,701.75
  4. Step 4: Simplify right side
    81,835.12x = 7,530,981,761.29
  5. Step 5: Solve for x
    x = 7,530,981,761.29/81,835.12
  6. Step 6: Final answer
    x = 92,026.28

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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.