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Finding the Fourth Proportional to 258,749.35, 387,992.77 and 118,387.69

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Solution

The fourth proportional to 258,749.35, 387,992.77 and 118,387.69 is: 177,521.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,749.35 : 387,992.77 = 118,387.69 : x
  2. Step 2: Convert to fraction form
    258,749.35/387,992.77 = 118,387.69/x
  3. Step 3: Cross multiply
    258,749.35x = 387,992.77 × 118,387.69
  4. Step 4: Simplify right side
    258,749.35x = 45,933,566,511.05
  5. Step 5: Solve for x
    x = 45,933,566,511.05/258,749.35
  6. Step 6: Final answer
    x = 177,521.48

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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.