Home / 138,269.97-190,410.75-120,112.38

Finding the Fourth Proportional to 138,269.97, 190,410.75 and 120,112.38

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Solution

The fourth proportional to 138,269.97, 190,410.75 and 120,112.38 is: 165,406.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,269.97 : 190,410.75 = 120,112.38 : x
  2. Step 2: Convert to fraction form
    138,269.97/190,410.75 = 120,112.38/x
  3. Step 3: Cross multiply
    138,269.97x = 190,410.75 × 120,112.38
  4. Step 4: Simplify right side
    138,269.97x = 22,870,688,360.09
  5. Step 5: Solve for x
    x = 22,870,688,360.09/138,269.97
  6. Step 6: Final answer
    x = 165,406.04

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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.