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Finding the Fourth Proportional to 122,439.40, 183,464.70 and 80,837.80

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Solution

The fourth proportional to 122,439.40, 183,464.70 and 80,837.80 is: 121,128.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,439.40 : 183,464.70 = 80,837.80 : x
  2. Step 2: Convert to fraction form
    122,439.40/183,464.70 = 80,837.80/x
  3. Step 3: Cross multiply
    122,439.40x = 183,464.70 × 80,837.80
  4. Step 4: Simplify right side
    122,439.40x = 14,830,882,725.66
  5. Step 5: Solve for x
    x = 14,830,882,725.66/122,439.40
  6. Step 6: Final answer
    x = 121,128.35

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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.