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Finding the Fourth Proportional to 122,995.60, 184,493.40 and 81,005.20

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Solution

The fourth proportional to 122,995.60, 184,493.40 and 81,005.20 is: 121,507.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,995.60 : 184,493.40 = 81,005.20 : x
  2. Step 2: Convert to fraction form
    122,995.60/184,493.40 = 81,005.20/x
  3. Step 3: Cross multiply
    122,995.60x = 184,493.40 × 81,005.20
  4. Step 4: Simplify right side
    122,995.60x = 14,944,924,765.68
  5. Step 5: Solve for x
    x = 14,944,924,765.68/122,995.60
  6. Step 6: Final answer
    x = 121,507.80

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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.