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Finding the Fourth Proportional to 122,486.60, 183,729.90 and 80,496.20

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Solution

The fourth proportional to 122,486.60, 183,729.90 and 80,496.20 is: 120,744.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,486.60 : 183,729.90 = 80,496.20 : x
  2. Step 2: Convert to fraction form
    122,486.60/183,729.90 = 80,496.20/x
  3. Step 3: Cross multiply
    122,486.60x = 183,729.90 × 80,496.20
  4. Step 4: Simplify right side
    122,486.60x = 14,789,558,776.38
  5. Step 5: Solve for x
    x = 14,789,558,776.38/122,486.60
  6. Step 6: Final answer
    x = 120,744.30

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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.