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Finding the Fourth Proportional to 122,321.62, 168,732.12 and 76,927.60

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Solution

The fourth proportional to 122,321.62, 168,732.12 and 76,927.60 is: 106,114.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,321.62 : 168,732.12 = 76,927.60 : x
  2. Step 2: Convert to fraction form
    122,321.62/168,732.12 = 76,927.60/x
  3. Step 3: Cross multiply
    122,321.62x = 168,732.12 × 76,927.60
  4. Step 4: Simplify right side
    122,321.62x = 12,980,156,190.85
  5. Step 5: Solve for x
    x = 12,980,156,190.85/122,321.62
  6. Step 6: Final answer
    x = 106,114.98

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1.5x scale

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.