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Finding the Fourth Proportional to 192,861.42, 266,147.01 and 107,979.90

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Solution

The fourth proportional to 192,861.42, 266,147.01 and 107,979.90 is: 149,011.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,861.42 : 266,147.01 = 107,979.90 : x
  2. Step 2: Convert to fraction form
    192,861.42/266,147.01 = 107,979.90/x
  3. Step 3: Cross multiply
    192,861.42x = 266,147.01 × 107,979.90
  4. Step 4: Simplify right side
    192,861.42x = 28,738,527,525.10
  5. Step 5: Solve for x
    x = 28,738,527,525.10/192,861.42
  6. Step 6: Final answer
    x = 149,011.28

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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.