Home / 81,217.46-121,932.30-65,215.54

Finding the Fourth Proportional to 81,217.46, 121,932.30 and 65,215.54

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Solution

The fourth proportional to 81,217.46, 121,932.30 and 65,215.54 is: 97,908.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,217.46 : 121,932.30 = 65,215.54 : x
  2. Step 2: Convert to fraction form
    81,217.46/121,932.30 = 65,215.54/x
  3. Step 3: Cross multiply
    81,217.46x = 121,932.30 × 65,215.54
  4. Step 4: Simplify right side
    81,217.46x = 7,951,880,787.94
  5. Step 5: Solve for x
    x = 7,951,880,787.94/81,217.46
  6. Step 6: Final answer
    x = 97,908.51

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1.5x scale

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.