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Finding the Fourth Proportional to 78,902.75, 108,886.65 and 43,093.80

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Solution

The fourth proportional to 78,902.75, 108,886.65 and 43,093.80 is: 59,469.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,902.75 : 108,886.65 = 43,093.80 : x
  2. Step 2: Convert to fraction form
    78,902.75/108,886.65 = 43,093.80/x
  3. Step 3: Cross multiply
    78,902.75x = 108,886.65 × 43,093.80
  4. Step 4: Simplify right side
    78,902.75x = 4,692,339,517.77
  5. Step 5: Solve for x
    x = 4,692,339,517.77/78,902.75
  6. Step 6: Final answer
    x = 59,469.91

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1.5x scale

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.