Home / 258,371.16-387,531.68-78,458.15

Finding the Fourth Proportional to 258,371.16, 387,531.68 and 78,458.15

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Solution

The fourth proportional to 258,371.16, 387,531.68 and 78,458.15 is: 117,679.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,371.16 : 387,531.68 = 78,458.15 : x
  2. Step 2: Convert to fraction form
    258,371.16/387,531.68 = 78,458.15/x
  3. Step 3: Cross multiply
    258,371.16x = 387,531.68 × 78,458.15
  4. Step 4: Simplify right side
    258,371.16x = 30,405,016,349.24
  5. Step 5: Solve for x
    x = 30,405,016,349.24/258,371.16
  6. Step 6: Final answer
    x = 117,679.61

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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.