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Finding the Fourth Proportional to 122,958.60, 184,437.90 and 81,405.60

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Solution

The fourth proportional to 122,958.60, 184,437.90 and 81,405.60 is: 122,108.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,958.60 : 184,437.90 = 81,405.60 : x
  2. Step 2: Convert to fraction form
    122,958.60/184,437.90 = 81,405.60/x
  3. Step 3: Cross multiply
    122,958.60x = 184,437.90 × 81,405.60
  4. Step 4: Simplify right side
    122,958.60x = 15,014,277,912.24
  5. Step 5: Solve for x
    x = 15,014,277,912.24/122,958.60
  6. Step 6: Final answer
    x = 122,108.40

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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.