Home / 126,128.56-189,227.40-66,161.02

Finding the Fourth Proportional to 126,128.56, 189,227.40 and 66,161.02

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Solution

The fourth proportional to 126,128.56, 189,227.40 and 66,161.02 is: 99,259.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,128.56 : 189,227.40 = 66,161.02 : x
  2. Step 2: Convert to fraction form
    126,128.56/189,227.40 = 66,161.02/x
  3. Step 3: Cross multiply
    126,128.56x = 189,227.40 × 66,161.02
  4. Step 4: Simplify right side
    126,128.56x = 12,519,477,795.95
  5. Step 5: Solve for x
    x = 12,519,477,795.95/126,128.56
  6. Step 6: Final answer
    x = 99,259.66

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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.