Home / 138,791.76-191,536.10-85,106.36

Finding the Fourth Proportional to 138,791.76, 191,536.10 and 85,106.36

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Solution

The fourth proportional to 138,791.76, 191,536.10 and 85,106.36 is: 117,448.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,791.76 : 191,536.10 = 85,106.36 : x
  2. Step 2: Convert to fraction form
    138,791.76/191,536.10 = 85,106.36/x
  3. Step 3: Cross multiply
    138,791.76x = 191,536.10 × 85,106.36
  4. Step 4: Simplify right side
    138,791.76x = 16,300,940,279.60
  5. Step 5: Solve for x
    x = 16,300,940,279.60/138,791.76
  6. Step 6: Final answer
    x = 117,448.91

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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.