Home / 138,786.76-191,529.20-85,101.36

Finding the Fourth Proportional to 138,786.76, 191,529.20 and 85,101.36

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Solution

The fourth proportional to 138,786.76, 191,529.20 and 85,101.36 is: 117,442.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,786.76 : 191,529.20 = 85,101.36 : x
  2. Step 2: Convert to fraction form
    138,786.76/191,529.20 = 85,101.36/x
  3. Step 3: Cross multiply
    138,786.76x = 191,529.20 × 85,101.36
  4. Step 4: Simplify right side
    138,786.76x = 16,299,395,399.71
  5. Step 5: Solve for x
    x = 16,299,395,399.71/138,786.76
  6. Step 6: Final answer
    x = 117,442.01

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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.