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Finding the Fourth Proportional to 258,594.36, 387,932.82 and 90,163.12

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Solution

The fourth proportional to 258,594.36, 387,932.82 and 90,163.12 is: 135,259.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,594.36 : 387,932.82 = 90,163.12 : x
  2. Step 2: Convert to fraction form
    258,594.36/387,932.82 = 90,163.12/x
  3. Step 3: Cross multiply
    258,594.36x = 387,932.82 × 90,163.12
  4. Step 4: Simplify right side
    258,594.36x = 34,977,233,401.60
  5. Step 5: Solve for x
    x = 34,977,233,401.60/258,594.36
  6. Step 6: Final answer
    x = 135,259.07

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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.