Home / 138,302.46-190,899.71-80,955.20

Finding the Fourth Proportional to 138,302.46, 190,899.71 and 80,955.20

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Solution

The fourth proportional to 138,302.46, 190,899.71 and 80,955.20 is: 111,742.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,302.46 : 190,899.71 = 80,955.20 : x
  2. Step 2: Convert to fraction form
    138,302.46/190,899.71 = 80,955.20/x
  3. Step 3: Cross multiply
    138,302.46x = 190,899.71 × 80,955.20
  4. Step 4: Simplify right side
    138,302.46x = 15,454,322,843.72
  5. Step 5: Solve for x
    x = 15,454,322,843.72/138,302.46
  6. Step 6: Final answer
    x = 111,742.94

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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.