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Finding the Fourth Proportional to 122,728.60, 184,200.90 and 72,746.20

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Solution

The fourth proportional to 122,728.60, 184,200.90 and 72,746.20 is: 109,183.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,728.60 : 184,200.90 = 72,746.20 : x
  2. Step 2: Convert to fraction form
    122,728.60/184,200.90 = 72,746.20/x
  3. Step 3: Cross multiply
    122,728.60x = 184,200.90 × 72,746.20
  4. Step 4: Simplify right side
    122,728.60x = 13,399,915,511.58
  5. Step 5: Solve for x
    x = 13,399,915,511.58/122,728.60
  6. Step 6: Final answer
    x = 109,183.32

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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.