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Finding the Fourth Proportional to 122,308.80, 168,787.55 and 67,861.98

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Solution

The fourth proportional to 122,308.80, 168,787.55 and 67,861.98 is: 93,650.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,308.80 : 168,787.55 = 67,861.98 : x
  2. Step 2: Convert to fraction form
    122,308.80/168,787.55 = 67,861.98/x
  3. Step 3: Cross multiply
    122,308.80x = 168,787.55 × 67,861.98
  4. Step 4: Simplify right side
    122,308.80x = 11,454,257,342.35
  5. Step 5: Solve for x
    x = 11,454,257,342.35/122,308.80
  6. Step 6: Final answer
    x = 93,650.31

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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.