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Finding the Fourth Proportional to 122,989.60, 184,484.40 and 120,656.80

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Solution

The fourth proportional to 122,989.60, 184,484.40 and 120,656.80 is: 180,985.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,989.60 : 184,484.40 = 120,656.80 : x
  2. Step 2: Convert to fraction form
    122,989.60/184,484.40 = 120,656.80/x
  3. Step 3: Cross multiply
    122,989.60x = 184,484.40 × 120,656.80
  4. Step 4: Simplify right side
    122,989.60x = 22,259,297,353.92
  5. Step 5: Solve for x
    x = 22,259,297,353.92/122,989.60
  6. Step 6: Final answer
    x = 180,985.20

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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.