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Finding the Fourth Proportional to 63,678.49, 87,849.06 and 39,763.64

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Solution

The fourth proportional to 63,678.49, 87,849.06 and 39,763.64 is: 54,856.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,678.49 : 87,849.06 = 39,763.64 : x
  2. Step 2: Convert to fraction form
    63,678.49/87,849.06 = 39,763.64/x
  3. Step 3: Cross multiply
    63,678.49x = 87,849.06 × 39,763.64
  4. Step 4: Simplify right side
    63,678.49x = 3,493,198,466.69
  5. Step 5: Solve for x
    x = 3,493,198,466.69/63,678.49
  6. Step 6: Final answer
    x = 54,856.81

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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.