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Finding the Fourth Proportional to 258,124.59, 387,241.56 and 80,644.98

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Solution

The fourth proportional to 258,124.59, 387,241.56 and 80,644.98 is: 120,984.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,124.59 : 387,241.56 = 80,644.98 : x
  2. Step 2: Convert to fraction form
    258,124.59/387,241.56 = 80,644.98/x
  3. Step 3: Cross multiply
    258,124.59x = 387,241.56 × 80,644.98
  4. Step 4: Simplify right side
    258,124.59x = 31,229,087,861.37
  5. Step 5: Solve for x
    x = 31,229,087,861.37/258,124.59
  6. Step 6: Final answer
    x = 120,984.55

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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.