Home / 138,171.06-190,676.86-77,742.74

Finding the Fourth Proportional to 138,171.06, 190,676.86 and 77,742.74

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Solution

The fourth proportional to 138,171.06, 190,676.86 and 77,742.74 is: 107,285.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,171.06 : 190,676.86 = 77,742.74 : x
  2. Step 2: Convert to fraction form
    138,171.06/190,676.86 = 77,742.74/x
  3. Step 3: Cross multiply
    138,171.06x = 190,676.86 × 77,742.74
  4. Step 4: Simplify right side
    138,171.06x = 14,823,741,833.33
  5. Step 5: Solve for x
    x = 14,823,741,833.33/138,171.06
  6. Step 6: Final answer
    x = 107,285.43

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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.