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Finding the Fourth Proportional to 78,755.76, 118,112.58 and 53,791.56

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Solution

The fourth proportional to 78,755.76, 118,112.58 and 53,791.56 is: 80,672.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,755.76 : 118,112.58 = 53,791.56 : x
  2. Step 2: Convert to fraction form
    78,755.76/118,112.58 = 53,791.56/x
  3. Step 3: Cross multiply
    78,755.76x = 118,112.58 × 53,791.56
  4. Step 4: Simplify right side
    78,755.76x = 6,353,459,933.82
  5. Step 5: Solve for x
    x = 6,353,459,933.82/78,755.76
  6. Step 6: Final answer
    x = 80,672.96

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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.