Home / 135,668.43-187,286.72-90,421.83

Finding the Fourth Proportional to 135,668.43, 187,286.72 and 90,421.83

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Solution

The fourth proportional to 135,668.43, 187,286.72 and 90,421.83 is: 124,824.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,668.43 : 187,286.72 = 90,421.83 : x
  2. Step 2: Convert to fraction form
    135,668.43/187,286.72 = 90,421.83/x
  3. Step 3: Cross multiply
    135,668.43x = 187,286.72 × 90,421.83
  4. Step 4: Simplify right side
    135,668.43x = 16,934,807,504.99
  5. Step 5: Solve for x
    x = 16,934,807,504.99/135,668.43
  6. Step 6: Final answer
    x = 124,824.97

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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.