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Finding the Fourth Proportional to 259,883.21, 389,857.62 and 91,363.93

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Solution

The fourth proportional to 259,883.21, 389,857.62 and 91,363.93 is: 137,057.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,883.21 : 389,857.62 = 91,363.93 : x
  2. Step 2: Convert to fraction form
    259,883.21/389,857.62 = 91,363.93/x
  3. Step 3: Cross multiply
    259,883.21x = 389,857.62 × 91,363.93
  4. Step 4: Simplify right side
    259,883.21x = 35,618,924,303.65
  5. Step 5: Solve for x
    x = 35,618,924,303.65/259,883.21
  6. Step 6: Final answer
    x = 137,057.43

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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.