Home / 135,518.25-187,020.05-81,792.78

Finding the Fourth Proportional to 135,518.25, 187,020.05 and 81,792.78

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Solution

The fourth proportional to 135,518.25, 187,020.05 and 81,792.78 is: 112,876.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,518.25 : 187,020.05 = 81,792.78 : x
  2. Step 2: Convert to fraction form
    135,518.25/187,020.05 = 81,792.78/x
  3. Step 3: Cross multiply
    135,518.25x = 187,020.05 × 81,792.78
  4. Step 4: Simplify right side
    135,518.25x = 15,296,889,805.24
  5. Step 5: Solve for x
    x = 15,296,889,805.24/135,518.25
  6. Step 6: Final answer
    x = 112,876.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.