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Finding the Fourth Proportional to 78,740.92, 118,110.90 and 28,824.49

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Solution

The fourth proportional to 78,740.92, 118,110.90 and 28,824.49 is: 43,236.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,740.92 : 118,110.90 = 28,824.49 : x
  2. Step 2: Convert to fraction form
    78,740.92/118,110.90 = 28,824.49/x
  3. Step 3: Cross multiply
    78,740.92x = 118,110.90 × 28,824.49
  4. Step 4: Simplify right side
    78,740.92x = 3,404,486,455.94
  5. Step 5: Solve for x
    x = 3,404,486,455.94/78,740.92
  6. Step 6: Final answer
    x = 43,236.56

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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.