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Finding the Fourth Proportional to 78,757.44, 118,004.70 and 55,341.96

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Solution

The fourth proportional to 78,757.44, 118,004.70 and 55,341.96 is: 82,920.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,757.44 : 118,004.70 = 55,341.96 : x
  2. Step 2: Convert to fraction form
    78,757.44/118,004.70 = 55,341.96/x
  3. Step 3: Cross multiply
    78,757.44x = 118,004.70 × 55,341.96
  4. Step 4: Simplify right side
    78,757.44x = 6,530,611,387.21
  5. Step 5: Solve for x
    x = 6,530,611,387.21/78,757.44
  6. Step 6: Final answer
    x = 82,920.56

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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.