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Finding the Fourth Proportional to 127,979.80, 191,969.70 and 119,231.80

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Solution

The fourth proportional to 127,979.80, 191,969.70 and 119,231.80 is: 178,847.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,979.80 : 191,969.70 = 119,231.80 : x
  2. Step 2: Convert to fraction form
    127,979.80/191,969.70 = 119,231.80/x
  3. Step 3: Cross multiply
    127,979.80x = 191,969.70 × 119,231.80
  4. Step 4: Simplify right side
    127,979.80x = 22,888,892,876.46
  5. Step 5: Solve for x
    x = 22,888,892,876.46/127,979.80
  6. Step 6: Final answer
    x = 178,847.70

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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.