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Finding the Fourth Proportional to 247,068.31, 340,945.32 and 139,636.12

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Solution

The fourth proportional to 247,068.31, 340,945.32 and 139,636.12 is: 192,692.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,068.31 : 340,945.32 = 139,636.12 : x
  2. Step 2: Convert to fraction form
    247,068.31/340,945.32 = 139,636.12/x
  3. Step 3: Cross multiply
    247,068.31x = 340,945.32 × 139,636.12
  4. Step 4: Simplify right side
    247,068.31x = 47,608,281,616.96
  5. Step 5: Solve for x
    x = 47,608,281,616.96/247,068.31
  6. Step 6: Final answer
    x = 192,692.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.