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Finding the Fourth Proportional to 71,378.79, 106,951.38 and 43,213.48

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Solution

The fourth proportional to 71,378.79, 106,951.38 and 43,213.48 is: 64,749.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,378.79 : 106,951.38 = 43,213.48 : x
  2. Step 2: Convert to fraction form
    71,378.79/106,951.38 = 43,213.48/x
  3. Step 3: Cross multiply
    71,378.79x = 106,951.38 × 43,213.48
  4. Step 4: Simplify right side
    71,378.79x = 4,621,740,891.17
  5. Step 5: Solve for x
    x = 4,621,740,891.17/71,378.79
  6. Step 6: Final answer
    x = 64,749.50

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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.