Home / 258,188.18-387,282.57-80,696.12

Finding the Fourth Proportional to 258,188.18, 387,282.57 and 80,696.12

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Solution

The fourth proportional to 258,188.18, 387,282.57 and 80,696.12 is: 121,044.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,188.18 : 387,282.57 = 80,696.12 : x
  2. Step 2: Convert to fraction form
    258,188.18/387,282.57 = 80,696.12/x
  3. Step 3: Cross multiply
    258,188.18x = 387,282.57 × 80,696.12
  4. Step 4: Simplify right side
    258,188.18x = 31,252,198,503.61
  5. Step 5: Solve for x
    x = 31,252,198,503.61/258,188.18
  6. Step 6: Final answer
    x = 121,044.27

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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.