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Finding the Fourth Proportional to 126,066.70, 188,840.85 and 86,668.30

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Solution

The fourth proportional to 126,066.70, 188,840.85 and 86,668.30 is: 129,824.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,066.70 : 188,840.85 = 86,668.30 : x
  2. Step 2: Convert to fraction form
    126,066.70/188,840.85 = 86,668.30/x
  3. Step 3: Cross multiply
    126,066.70x = 188,840.85 × 86,668.30
  4. Step 4: Simplify right side
    126,066.70x = 16,366,515,440.06
  5. Step 5: Solve for x
    x = 16,366,515,440.06/126,066.70
  6. Step 6: Final answer
    x = 129,824.26

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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.