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Finding the Fourth Proportional to 126,715.80, 189,987.30 and 60,187.80

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Solution

The fourth proportional to 126,715.80, 189,987.30 and 60,187.80 is: 90,240.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,715.80 : 189,987.30 = 60,187.80 : x
  2. Step 2: Convert to fraction form
    126,715.80/189,987.30 = 60,187.80/x
  3. Step 3: Cross multiply
    126,715.80x = 189,987.30 × 60,187.80
  4. Step 4: Simplify right side
    126,715.80x = 11,434,917,614.94
  5. Step 5: Solve for x
    x = 11,434,917,614.94/126,715.80
  6. Step 6: Final answer
    x = 90,240.66

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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.