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Finding the Fourth Proportional to 81,856.96, 122,785.48 and 36,825.72

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Solution

The fourth proportional to 81,856.96, 122,785.48 and 36,825.72 is: 55,238.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,856.96 : 122,785.48 = 36,825.72 : x
  2. Step 2: Convert to fraction form
    81,856.96/122,785.48 = 36,825.72/x
  3. Step 3: Cross multiply
    81,856.96x = 122,785.48 × 36,825.72
  4. Step 4: Simplify right side
    81,856.96x = 4,521,663,522.42
  5. Step 5: Solve for x
    x = 4,521,663,522.42/81,856.96
  6. Step 6: Final answer
    x = 55,238.60

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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.