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Finding the Fourth Proportional to 258,433.25, 387,619.09 and 68,907.83

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Solution

The fourth proportional to 258,433.25, 387,619.09 and 68,907.83 is: 103,353.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,433.25 : 387,619.09 = 68,907.83 : x
  2. Step 2: Convert to fraction form
    258,433.25/387,619.09 = 68,907.83/x
  3. Step 3: Cross multiply
    258,433.25x = 387,619.09 × 68,907.83
  4. Step 4: Simplify right side
    258,433.25x = 26,709,988,248.11
  5. Step 5: Solve for x
    x = 26,709,988,248.11/258,433.25
  6. Step 6: Final answer
    x = 103,353.53

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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.