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Finding the Fourth Proportional to 63,679.26, 87,840.78 and 39,764.42

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Solution

The fourth proportional to 63,679.26, 87,840.78 and 39,764.42 is: 54,852.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,679.26 : 87,840.78 = 39,764.42 : x
  2. Step 2: Convert to fraction form
    63,679.26/87,840.78 = 39,764.42/x
  3. Step 3: Cross multiply
    63,679.26x = 87,840.78 × 39,764.42
  4. Step 4: Simplify right side
    63,679.26x = 3,492,937,669.05
  5. Step 5: Solve for x
    x = 3,492,937,669.05/63,679.26
  6. Step 6: Final answer
    x = 54,852.05

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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.