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Finding the Fourth Proportional to 85,956.66, 128,932.92 and 50,641.95

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Solution

The fourth proportional to 85,956.66, 128,932.92 and 50,641.95 is: 75,961.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,956.66 : 128,932.92 = 50,641.95 : x
  2. Step 2: Convert to fraction form
    85,956.66/128,932.92 = 50,641.95/x
  3. Step 3: Cross multiply
    85,956.66x = 128,932.92 × 50,641.95
  4. Step 4: Simplify right side
    85,956.66x = 6,529,414,487.99
  5. Step 5: Solve for x
    x = 6,529,414,487.99/85,956.66
  6. Step 6: Final answer
    x = 75,961.71

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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.