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Finding the Fourth Proportional to 258,219.89, 387,299.00 and 68,694.17

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Solution

The fourth proportional to 258,219.89, 387,299.00 and 68,694.17 is: 103,033.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,219.89 : 387,299.00 = 68,694.17 : x
  2. Step 2: Convert to fraction form
    258,219.89/387,299.00 = 68,694.17/x
  3. Step 3: Cross multiply
    258,219.89x = 387,299.00 × 68,694.17
  4. Step 4: Simplify right side
    258,219.89x = 26,605,181,066.86
  5. Step 5: Solve for x
    x = 26,605,181,066.86/258,219.89
  6. Step 6: Final answer
    x = 103,033.05

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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.