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Finding the Fourth Proportional to 258,912.60, 387,808.08 and 125,513.80

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Solution

The fourth proportional to 258,912.60, 387,808.08 and 125,513.80 is: 187,998.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,912.60 : 387,808.08 = 125,513.80 : x
  2. Step 2: Convert to fraction form
    258,912.60/387,808.08 = 125,513.80/x
  3. Step 3: Cross multiply
    258,912.60x = 387,808.08 × 125,513.80
  4. Step 4: Simplify right side
    258,912.60x = 48,675,265,791.50
  5. Step 5: Solve for x
    x = 48,675,265,791.50/258,912.60
  6. Step 6: Final answer
    x = 187,998.83

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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.