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Finding the Fourth Proportional to 68,379.49, 102,370.60 and 39,829.39

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Solution

The fourth proportional to 68,379.49, 102,370.60 and 39,829.39 is: 59,628.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,379.49 : 102,370.60 = 39,829.39 : x
  2. Step 2: Convert to fraction form
    68,379.49/102,370.60 = 39,829.39/x
  3. Step 3: Cross multiply
    68,379.49x = 102,370.60 × 39,829.39
  4. Step 4: Simplify right side
    68,379.49x = 4,077,358,551.93
  5. Step 5: Solve for x
    x = 4,077,358,551.93/68,379.49
  6. Step 6: Final answer
    x = 59,628.38

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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.