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Finding the Fourth Proportional to 81,204.60, 121,763.70 and 34,404.60

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Solution

The fourth proportional to 81,204.60, 121,763.70 and 34,404.60 is: 51,588.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,204.60 : 121,763.70 = 34,404.60 : x
  2. Step 2: Convert to fraction form
    81,204.60/121,763.70 = 34,404.60/x
  3. Step 3: Cross multiply
    81,204.60x = 121,763.70 × 34,404.60
  4. Step 4: Simplify right side
    81,204.60x = 4,189,231,393.02
  5. Step 5: Solve for x
    x = 4,189,231,393.02/81,204.60
  6. Step 6: Final answer
    x = 51,588.60

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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.