Home / 138,161.43-190,649.25-77,730.75

Finding the Fourth Proportional to 138,161.43, 190,649.25 and 77,730.75

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Solution

The fourth proportional to 138,161.43, 190,649.25 and 77,730.75 is: 107,260.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,161.43 : 190,649.25 = 77,730.75 : x
  2. Step 2: Convert to fraction form
    138,161.43/190,649.25 = 77,730.75/x
  3. Step 3: Cross multiply
    138,161.43x = 190,649.25 × 77,730.75
  4. Step 4: Simplify right side
    138,161.43x = 14,819,309,189.44
  5. Step 5: Solve for x
    x = 14,819,309,189.44/138,161.43
  6. Step 6: Final answer
    x = 107,260.83

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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.