Home / 135,508.09-187,007.59-81,791.98

Finding the Fourth Proportional to 135,508.09, 187,007.59 and 81,791.98

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Solution

The fourth proportional to 135,508.09, 187,007.59 and 81,791.98 is: 112,876.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,508.09 : 187,007.59 = 81,791.98 : x
  2. Step 2: Convert to fraction form
    135,508.09/187,007.59 = 81,791.98/x
  3. Step 3: Cross multiply
    135,508.09x = 187,007.59 × 81,791.98
  4. Step 4: Simplify right side
    135,508.09x = 15,295,720,235.77
  5. Step 5: Solve for x
    x = 15,295,720,235.77/135,508.09
  6. Step 6: Final answer
    x = 112,876.81

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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.