Home / 126,379.38-189,555.79-42,130.47

Finding the Fourth Proportional to 126,379.38, 189,555.79 and 42,130.47

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Solution

The fourth proportional to 126,379.38, 189,555.79 and 42,130.47 is: 63,191.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,379.38 : 189,555.79 = 42,130.47 : x
  2. Step 2: Convert to fraction form
    126,379.38/189,555.79 = 42,130.47/x
  3. Step 3: Cross multiply
    126,379.38x = 189,555.79 × 42,130.47
  4. Step 4: Simplify right side
    126,379.38x = 7,986,074,523.92
  5. Step 5: Solve for x
    x = 7,986,074,523.92/126,379.38
  6. Step 6: Final answer
    x = 63,191.28

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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.