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Finding the Fourth Proportional to 266,086.40, 399,129.60 and 108,233.60

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Solution

The fourth proportional to 266,086.40, 399,129.60 and 108,233.60 is: 162,350.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,086.40 : 399,129.60 = 108,233.60 : x
  2. Step 2: Convert to fraction form
    266,086.40/399,129.60 = 108,233.60/x
  3. Step 3: Cross multiply
    266,086.40x = 399,129.60 × 108,233.60
  4. Step 4: Simplify right side
    266,086.40x = 43,199,233,474.56
  5. Step 5: Solve for x
    x = 43,199,233,474.56/266,086.40
  6. Step 6: Final answer
    x = 162,350.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.