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Finding the Fourth Proportional to 122,673.60, 184,118.40 and 72,691.20

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Solution

The fourth proportional to 122,673.60, 184,118.40 and 72,691.20 is: 109,100.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,673.60 : 184,118.40 = 72,691.20 : x
  2. Step 2: Convert to fraction form
    122,673.60/184,118.40 = 72,691.20/x
  3. Step 3: Cross multiply
    122,673.60x = 184,118.40 × 72,691.20
  4. Step 4: Simplify right side
    122,673.60x = 13,383,787,438.08
  5. Step 5: Solve for x
    x = 13,383,787,438.08/122,673.60
  6. Step 6: Final answer
    x = 109,100.80

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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.