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Finding the Fourth Proportional to 78,844.86, 118,274.94 and 28,912.92

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Solution

The fourth proportional to 78,844.86, 118,274.94 and 28,912.92 is: 43,372.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,844.86 : 118,274.94 = 28,912.92 : x
  2. Step 2: Convert to fraction form
    78,844.86/118,274.94 = 28,912.92/x
  3. Step 3: Cross multiply
    78,844.86x = 118,274.94 × 28,912.92
  4. Step 4: Simplify right side
    78,844.86x = 3,419,673,878.22
  5. Step 5: Solve for x
    x = 3,419,673,878.22/78,844.86
  6. Step 6: Final answer
    x = 43,372.19

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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.