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Finding the Fourth Proportional to 127,620.40, 191,471.40 and 38,890.80

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Solution

The fourth proportional to 127,620.40, 191,471.40 and 38,890.80 is: 58,348.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,620.40 : 191,471.40 = 38,890.80 : x
  2. Step 2: Convert to fraction form
    127,620.40/191,471.40 = 38,890.80/x
  3. Step 3: Cross multiply
    127,620.40x = 191,471.40 × 38,890.80
  4. Step 4: Simplify right side
    127,620.40x = 7,446,475,923.12
  5. Step 5: Solve for x
    x = 7,446,475,923.12/127,620.40
  6. Step 6: Final answer
    x = 58,348.63

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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.