Home / 81,922.40-122,787.68-31,288.26

Finding the Fourth Proportional to 81,922.40, 122,787.68 and 31,288.26

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Solution

The fourth proportional to 81,922.40, 122,787.68 and 31,288.26 is: 46,895.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,922.40 : 122,787.68 = 31,288.26 : x
  2. Step 2: Convert to fraction form
    81,922.40/122,787.68 = 31,288.26/x
  3. Step 3: Cross multiply
    81,922.40x = 122,787.68 × 31,288.26
  4. Step 4: Simplify right side
    81,922.40x = 3,841,812,856.64
  5. Step 5: Solve for x
    x = 3,841,812,856.64/81,922.40
  6. Step 6: Final answer
    x = 46,895.76

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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.