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Finding the Fourth Proportional to 99,662.44, 137,218.98 and 80,861.80

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Solution

The fourth proportional to 99,662.44, 137,218.98 and 80,861.80 is: 111,333.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,662.44 : 137,218.98 = 80,861.80 : x
  2. Step 2: Convert to fraction form
    99,662.44/137,218.98 = 80,861.80/x
  3. Step 3: Cross multiply
    99,662.44x = 137,218.98 × 80,861.80
  4. Step 4: Simplify right side
    99,662.44x = 11,095,773,716.96
  5. Step 5: Solve for x
    x = 11,095,773,716.96/99,662.44
  6. Step 6: Final answer
    x = 111,333.55

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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.