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Finding the Fourth Proportional to 217,748.78, 300,485.61 and 122,259.50

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Solution

The fourth proportional to 217,748.78, 300,485.61 and 122,259.50 is: 168,713.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,748.78 : 300,485.61 = 122,259.50 : x
  2. Step 2: Convert to fraction form
    217,748.78/300,485.61 = 122,259.50/x
  3. Step 3: Cross multiply
    217,748.78x = 300,485.61 × 122,259.50
  4. Step 4: Simplify right side
    217,748.78x = 36,737,220,435.80
  5. Step 5: Solve for x
    x = 36,737,220,435.80/217,748.78
  6. Step 6: Final answer
    x = 168,713.78

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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.