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Finding the Fourth Proportional to 208,549.08, 312,845.52 and 68,318.64

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Solution

The fourth proportional to 208,549.08, 312,845.52 and 68,318.64 is: 102,485.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,549.08 : 312,845.52 = 68,318.64 : x
  2. Step 2: Convert to fraction form
    208,549.08/312,845.52 = 68,318.64/x
  3. Step 3: Cross multiply
    208,549.08x = 312,845.52 × 68,318.64
  4. Step 4: Simplify right side
    208,549.08x = 21,373,180,456.49
  5. Step 5: Solve for x
    x = 21,373,180,456.49/208,549.08
  6. Step 6: Final answer
    x = 102,485.13

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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.