Home / 126,891.12-190,129.03-76,819.45

Finding the Fourth Proportional to 126,891.12, 190,129.03 and 76,819.45

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Solution

The fourth proportional to 126,891.12, 190,129.03 and 76,819.45 is: 115,103.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,891.12 : 190,129.03 = 76,819.45 : x
  2. Step 2: Convert to fraction form
    126,891.12/190,129.03 = 76,819.45/x
  3. Step 3: Cross multiply
    126,891.12x = 190,129.03 × 76,819.45
  4. Step 4: Simplify right side
    126,891.12x = 14,605,607,513.63
  5. Step 5: Solve for x
    x = 14,605,607,513.63/126,891.12
  6. Step 6: Final answer
    x = 115,103.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.