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Finding the Fourth Proportional to 122,543.40, 183,620.70 and 80,941.80

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Solution

The fourth proportional to 122,543.40, 183,620.70 and 80,941.80 is: 121,284.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,543.40 : 183,620.70 = 80,941.80 : x
  2. Step 2: Convert to fraction form
    122,543.40/183,620.70 = 80,941.80/x
  3. Step 3: Cross multiply
    122,543.40x = 183,620.70 × 80,941.80
  4. Step 4: Simplify right side
    122,543.40x = 14,862,589,975.26
  5. Step 5: Solve for x
    x = 14,862,589,975.26/122,543.40
  6. Step 6: Final answer
    x = 121,284.30

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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.