Home / 126,540-174,628.08-81,905.76

Finding the Fourth Proportional to 126,540, 174,628.08 and 81,905.76

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Solution

The fourth proportional to 126,540, 174,628.08 and 81,905.76 is: 113,031.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,540 : 174,628.08 = 81,905.76 : x
  2. Step 2: Convert to fraction form
    126,540/174,628.08 = 81,905.76/x
  3. Step 3: Cross multiply
    126,540x = 174,628.08 × 81,905.76
  4. Step 4: Simplify right side
    126,540x = 14,303,045,609.74
  5. Step 5: Solve for x
    x = 14,303,045,609.74/126,540
  6. Step 6: Final answer
    x = 113,031.81

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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.