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Finding the Fourth Proportional to 122,479.60, 183,719.40 and 80,489.20

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Solution

The fourth proportional to 122,479.60, 183,719.40 and 80,489.20 is: 120,733.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,479.60 : 183,719.40 = 80,489.20 : x
  2. Step 2: Convert to fraction form
    122,479.60/183,719.40 = 80,489.20/x
  3. Step 3: Cross multiply
    122,479.60x = 183,719.40 × 80,489.20
  4. Step 4: Simplify right side
    122,479.60x = 14,787,427,530.48
  5. Step 5: Solve for x
    x = 14,787,427,530.48/122,479.60
  6. Step 6: Final answer
    x = 120,733.80

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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.