Home / 126,048.25-189,072.37-86,485.42

Finding the Fourth Proportional to 126,048.25, 189,072.37 and 86,485.42

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Solution

The fourth proportional to 126,048.25, 189,072.37 and 86,485.42 is: 129,728.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,048.25 : 189,072.37 = 86,485.42 : x
  2. Step 2: Convert to fraction form
    126,048.25/189,072.37 = 86,485.42/x
  3. Step 3: Cross multiply
    126,048.25x = 189,072.37 × 86,485.42
  4. Step 4: Simplify right side
    126,048.25x = 16,352,002,384.48
  5. Step 5: Solve for x
    x = 16,352,002,384.48/126,048.25
  6. Step 6: Final answer
    x = 129,728.12

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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.