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Finding the Fourth Proportional to 258,343.84, 387,154.89 and 125,188.75

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Solution

The fourth proportional to 258,343.84, 387,154.89 and 125,188.75 is: 187,608.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,343.84 : 387,154.89 = 125,188.75 : x
  2. Step 2: Convert to fraction form
    258,343.84/387,154.89 = 125,188.75/x
  3. Step 3: Cross multiply
    258,343.84x = 387,154.89 × 125,188.75
  4. Step 4: Simplify right side
    258,343.84x = 48,467,436,735.49
  5. Step 5: Solve for x
    x = 48,467,436,735.49/258,343.84
  6. Step 6: Final answer
    x = 187,608.25

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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.