Home / 258,363.09-387,335.52-80,778.69

Finding the Fourth Proportional to 258,363.09, 387,335.52 and 80,778.69

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Solution

The fourth proportional to 258,363.09, 387,335.52 and 80,778.69 is: 121,102.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,363.09 : 387,335.52 = 80,778.69 : x
  2. Step 2: Convert to fraction form
    258,363.09/387,335.52 = 80,778.69/x
  3. Step 3: Cross multiply
    258,363.09x = 387,335.52 × 80,778.69
  4. Step 4: Simplify right side
    258,363.09x = 31,288,455,896.07
  5. Step 5: Solve for x
    x = 31,288,455,896.07/258,363.09
  6. Step 6: Final answer
    x = 121,102.65

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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.