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Finding the Fourth Proportional to 78,845.94, 108,806.49 and 43,035.66

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Solution

The fourth proportional to 78,845.94, 108,806.49 and 43,035.66 is: 59,388.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,845.94 : 108,806.49 = 43,035.66 : x
  2. Step 2: Convert to fraction form
    78,845.94/108,806.49 = 43,035.66/x
  3. Step 3: Cross multiply
    78,845.94x = 108,806.49 × 43,035.66
  4. Step 4: Simplify right side
    78,845.94x = 4,682,559,109.43
  5. Step 5: Solve for x
    x = 4,682,559,109.43/78,845.94
  6. Step 6: Final answer
    x = 59,388.72

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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.