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Finding the Fourth Proportional to 258,292.39, 387,427.84 and 89,850.86

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Solution

The fourth proportional to 258,292.39, 387,427.84 and 89,850.86 is: 134,772.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,292.39 : 387,427.84 = 89,850.86 : x
  2. Step 2: Convert to fraction form
    258,292.39/387,427.84 = 89,850.86/x
  3. Step 3: Cross multiply
    258,292.39x = 387,427.84 × 89,850.86
  4. Step 4: Simplify right side
    258,292.39x = 34,810,724,611.94
  5. Step 5: Solve for x
    x = 34,810,724,611.94/258,292.39
  6. Step 6: Final answer
    x = 134,772.55

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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.