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Finding the Fourth Proportional to 258,231, 387,361.08 and 92,019

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Solution

The fourth proportional to 258,231, 387,361.08 and 92,019 is: 138,033.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,231 : 387,361.08 = 92,019 : x
  2. Step 2: Convert to fraction form
    258,231/387,361.08 = 92,019/x
  3. Step 3: Cross multiply
    258,231x = 387,361.08 × 92,019
  4. Step 4: Simplify right side
    258,231x = 35,644,579,220.52
  5. Step 5: Solve for x
    x = 35,644,579,220.52/258,231
  6. Step 6: Final answer
    x = 138,033.70

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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.