Home / 138,018.63-190,452.60-80,671.41

Finding the Fourth Proportional to 138,018.63, 190,452.60 and 80,671.41

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Solution

The fourth proportional to 138,018.63, 190,452.60 and 80,671.41 is: 111,318.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,018.63 : 190,452.60 = 80,671.41 : x
  2. Step 2: Convert to fraction form
    138,018.63/190,452.60 = 80,671.41/x
  3. Step 3: Cross multiply
    138,018.63x = 190,452.60 × 80,671.41
  4. Step 4: Simplify right side
    138,018.63x = 15,364,079,780.17
  5. Step 5: Solve for x
    x = 15,364,079,780.17/138,018.63
  6. Step 6: Final answer
    x = 111,318.88

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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.