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Finding the Fourth Proportional to 167,430.38, 231,053.92 and 91,978.88

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Solution

The fourth proportional to 167,430.38, 231,053.92 and 91,978.88 is: 126,930.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,430.38 : 231,053.92 = 91,978.88 : x
  2. Step 2: Convert to fraction form
    167,430.38/231,053.92 = 91,978.88/x
  3. Step 3: Cross multiply
    167,430.38x = 231,053.92 × 91,978.88
  4. Step 4: Simplify right side
    167,430.38x = 21,252,079,395.99
  5. Step 5: Solve for x
    x = 21,252,079,395.99/167,430.38
  6. Step 6: Final answer
    x = 126,930.85

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1.5x scale

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.