Home / 138,175.14-190,664.55-87,168.54

Finding the Fourth Proportional to 138,175.14, 190,664.55 and 87,168.54

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Solution

The fourth proportional to 138,175.14, 190,664.55 and 87,168.54 is: 120,281.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,175.14 : 190,664.55 = 87,168.54 : x
  2. Step 2: Convert to fraction form
    138,175.14/190,664.55 = 87,168.54/x
  3. Step 3: Cross multiply
    138,175.14x = 190,664.55 × 87,168.54
  4. Step 4: Simplify right side
    138,175.14x = 16,619,950,453.26
  5. Step 5: Solve for x
    x = 16,619,950,453.26/138,175.14
  6. Step 6: Final answer
    x = 120,281.77

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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.