Home / 138,272.27-190,608.39-112,739.45

Finding the Fourth Proportional to 138,272.27, 190,608.39 and 112,739.45

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Solution

The fourth proportional to 138,272.27, 190,608.39 and 112,739.45 is: 155,411.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,272.27 : 190,608.39 = 112,739.45 : x
  2. Step 2: Convert to fraction form
    138,272.27/190,608.39 = 112,739.45/x
  3. Step 3: Cross multiply
    138,272.27x = 190,608.39 × 112,739.45
  4. Step 4: Simplify right side
    138,272.27x = 21,489,084,100.94
  5. Step 5: Solve for x
    x = 21,489,084,100.94/138,272.27
  6. Step 6: Final answer
    x = 155,411.38

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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.