Home / 138,121.47-190,609.59-81,532.84

Finding the Fourth Proportional to 138,121.47, 190,609.59 and 81,532.84

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Solution

The fourth proportional to 138,121.47, 190,609.59 and 81,532.84 is: 112,516.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,121.47 : 190,609.59 = 81,532.84 : x
  2. Step 2: Convert to fraction form
    138,121.47/190,609.59 = 81,532.84/x
  3. Step 3: Cross multiply
    138,121.47x = 190,609.59 × 81,532.84
  4. Step 4: Simplify right side
    138,121.47x = 15,540,941,203.94
  5. Step 5: Solve for x
    x = 15,540,941,203.94/138,121.47
  6. Step 6: Final answer
    x = 112,516.48

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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.