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Finding the Fourth Proportional to 78,891.03, 108,865.62 and 43,074.18

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Solution

The fourth proportional to 78,891.03, 108,865.62 and 43,074.18 is: 59,440.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,891.03 : 108,865.62 = 43,074.18 : x
  2. Step 2: Convert to fraction form
    78,891.03/108,865.62 = 43,074.18/x
  3. Step 3: Cross multiply
    78,891.03x = 108,865.62 × 43,074.18
  4. Step 4: Simplify right side
    78,891.03x = 4,689,297,311.69
  5. Step 5: Solve for x
    x = 4,689,297,311.69/78,891.03
  6. Step 6: Final answer
    x = 59,440.18

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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.