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Finding the Fourth Proportional to 45,863.42, 68,787.75 and 12,575.76

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Solution

The fourth proportional to 45,863.42, 68,787.75 and 12,575.76 is: 18,861.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,863.42 : 68,787.75 = 12,575.76 : x
  2. Step 2: Convert to fraction form
    45,863.42/68,787.75 = 12,575.76/x
  3. Step 3: Cross multiply
    45,863.42x = 68,787.75 × 12,575.76
  4. Step 4: Simplify right side
    45,863.42x = 865,058,234.94
  5. Step 5: Solve for x
    x = 865,058,234.94/45,863.42
  6. Step 6: Final answer
    x = 18,861.62

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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.