Home / 138,345.44-190,841.28-120,408.80

Finding the Fourth Proportional to 138,345.44, 190,841.28 and 120,408.80

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Solution

The fourth proportional to 138,345.44, 190,841.28 and 120,408.80 is: 166,098.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,345.44 : 190,841.28 = 120,408.80 : x
  2. Step 2: Convert to fraction form
    138,345.44/190,841.28 = 120,408.80/x
  3. Step 3: Cross multiply
    138,345.44x = 190,841.28 × 120,408.80
  4. Step 4: Simplify right side
    138,345.44x = 22,978,969,515.26
  5. Step 5: Solve for x
    x = 22,978,969,515.26/138,345.44
  6. Step 6: Final answer
    x = 166,098.50

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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.