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Finding the Fourth Proportional to 258,189.42, 387,273.60 and 89,747.94

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Solution

The fourth proportional to 258,189.42, 387,273.60 and 89,747.94 is: 134,618.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,189.42 : 387,273.60 = 89,747.94 : x
  2. Step 2: Convert to fraction form
    258,189.42/387,273.60 = 89,747.94/x
  3. Step 3: Cross multiply
    258,189.42x = 387,273.60 × 89,747.94
  4. Step 4: Simplify right side
    258,189.42x = 34,757,007,816.38
  5. Step 5: Solve for x
    x = 34,757,007,816.38/258,189.42
  6. Step 6: Final answer
    x = 134,618.25

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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.