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Finding the Fourth Proportional to 127,889.94, 191,559.98 and 103,765.85

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Solution

The fourth proportional to 127,889.94, 191,559.98 and 103,765.85 is: 155,425.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,889.94 : 191,559.98 = 103,765.85 : x
  2. Step 2: Convert to fraction form
    127,889.94/191,559.98 = 103,765.85/x
  3. Step 3: Cross multiply
    127,889.94x = 191,559.98 × 103,765.85
  4. Step 4: Simplify right side
    127,889.94x = 19,877,384,150.68
  5. Step 5: Solve for x
    x = 19,877,384,150.68/127,889.94
  6. Step 6: Final answer
    x = 155,425.71

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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.