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Finding the Fourth Proportional to 122,956.60, 184,434.90 and 81,403.60

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Solution

The fourth proportional to 122,956.60, 184,434.90 and 81,403.60 is: 122,105.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,956.60 : 184,434.90 = 81,403.60 : x
  2. Step 2: Convert to fraction form
    122,956.60/184,434.90 = 81,403.60/x
  3. Step 3: Cross multiply
    122,956.60x = 184,434.90 × 81,403.60
  4. Step 4: Simplify right side
    122,956.60x = 15,013,664,825.64
  5. Step 5: Solve for x
    x = 15,013,664,825.64/122,956.60
  6. Step 6: Final answer
    x = 122,105.40

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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.