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Finding the Fourth Proportional to 63,683.80, 87,856.38 and 39,768.96

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Solution

The fourth proportional to 63,683.80, 87,856.38 and 39,768.96 is: 54,864.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,683.80 : 87,856.38 = 39,768.96 : x
  2. Step 2: Convert to fraction form
    63,683.80/87,856.38 = 39,768.96/x
  3. Step 3: Cross multiply
    63,683.80x = 87,856.38 × 39,768.96
  4. Step 4: Simplify right side
    63,683.80x = 3,493,956,861.96
  5. Step 5: Solve for x
    x = 3,493,956,861.96/63,683.80
  6. Step 6: Final answer
    x = 54,864.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.