Home / 78,930.96-118,383.66-28,998.78

Finding the Fourth Proportional to 78,930.96, 118,383.66 and 28,998.78

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Solution

The fourth proportional to 78,930.96, 118,383.66 and 28,998.78 is: 43,493.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,930.96 : 118,383.66 = 28,998.78 : x
  2. Step 2: Convert to fraction form
    78,930.96/118,383.66 = 28,998.78/x
  3. Step 3: Cross multiply
    78,930.96x = 118,383.66 × 28,998.78
  4. Step 4: Simplify right side
    78,930.96x = 3,432,981,711.93
  5. Step 5: Solve for x
    x = 3,432,981,711.93/78,930.96
  6. Step 6: Final answer
    x = 43,493.47

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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.