Home / 138,304.92-190,459.20-120,147.36

Finding the Fourth Proportional to 138,304.92, 190,459.20 and 120,147.36

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Solution

The fourth proportional to 138,304.92, 190,459.20 and 120,147.36 is: 165,454.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,304.92 : 190,459.20 = 120,147.36 : x
  2. Step 2: Convert to fraction form
    138,304.92/190,459.20 = 120,147.36/x
  3. Step 3: Cross multiply
    138,304.92x = 190,459.20 × 120,147.36
  4. Step 4: Simplify right side
    138,304.92x = 22,883,170,067.71
  5. Step 5: Solve for x
    x = 22,883,170,067.71/138,304.92
  6. Step 6: Final answer
    x = 165,454.49

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1.5x scale

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.