Home / 126,209.40-189,083.70-76,903.80

Finding the Fourth Proportional to 126,209.40, 189,083.70 and 76,903.80

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Solution

The fourth proportional to 126,209.40, 189,083.70 and 76,903.80 is: 115,215.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,209.40 : 189,083.70 = 76,903.80 : x
  2. Step 2: Convert to fraction form
    126,209.40/189,083.70 = 76,903.80/x
  3. Step 3: Cross multiply
    126,209.40x = 189,083.70 × 76,903.80
  4. Step 4: Simplify right side
    126,209.40x = 14,541,255,048.06
  5. Step 5: Solve for x
    x = 14,541,255,048.06/126,209.40
  6. Step 6: Final answer
    x = 115,215.31

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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.