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Finding the Fourth Proportional to 69,280.70, 103,661.56 and 49,336.28

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Solution

The fourth proportional to 69,280.70, 103,661.56 and 49,336.28 is: 73,819.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,280.70 : 103,661.56 = 49,336.28 : x
  2. Step 2: Convert to fraction form
    69,280.70/103,661.56 = 49,336.28/x
  3. Step 3: Cross multiply
    69,280.70x = 103,661.56 × 49,336.28
  4. Step 4: Simplify right side
    69,280.70x = 5,114,275,749.40
  5. Step 5: Solve for x
    x = 5,114,275,749.40/69,280.70
  6. Step 6: Final answer
    x = 73,819.63

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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.