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Finding the Fourth Proportional to 127,243.70, 190,943.55 and 52,399.70

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Solution

The fourth proportional to 127,243.70, 190,943.55 and 52,399.70 is: 78,631.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,243.70 : 190,943.55 = 52,399.70 : x
  2. Step 2: Convert to fraction form
    127,243.70/190,943.55 = 52,399.70/x
  3. Step 3: Cross multiply
    127,243.70x = 190,943.55 × 52,399.70
  4. Step 4: Simplify right side
    127,243.70x = 10,005,384,736.94
  5. Step 5: Solve for x
    x = 10,005,384,736.94/127,243.70
  6. Step 6: Final answer
    x = 78,631.67

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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.