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Finding the Fourth Proportional to 78,929.27, 108,920.61 and 43,119.44

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Solution

The fourth proportional to 78,929.27, 108,920.61 and 43,119.44 is: 59,503.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,929.27 : 108,920.61 = 43,119.44 : x
  2. Step 2: Convert to fraction form
    78,929.27/108,920.61 = 43,119.44/x
  3. Step 3: Cross multiply
    78,929.27x = 108,920.61 × 43,119.44
  4. Step 4: Simplify right side
    78,929.27x = 4,696,595,707.66
  5. Step 5: Solve for x
    x = 4,696,595,707.66/78,929.27
  6. Step 6: Final answer
    x = 59,503.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.