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Finding the Fourth Proportional to 269,186.52, 403,786.26 and 128,790.84

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Solution

The fourth proportional to 269,186.52, 403,786.26 and 128,790.84 is: 193,189.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,186.52 : 403,786.26 = 128,790.84 : x
  2. Step 2: Convert to fraction form
    269,186.52/403,786.26 = 128,790.84/x
  3. Step 3: Cross multiply
    269,186.52x = 403,786.26 × 128,790.84
  4. Step 4: Simplify right side
    269,186.52x = 52,003,971,605.86
  5. Step 5: Solve for x
    x = 52,003,971,605.86/269,186.52
  6. Step 6: Final answer
    x = 193,189.36

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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.