Home / 81,748.12-122,627.37-21,775.60

Finding the Fourth Proportional to 81,748.12, 122,627.37 and 21,775.60

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Solution

The fourth proportional to 81,748.12, 122,627.37 and 21,775.60 is: 32,664.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,748.12 : 122,627.37 = 21,775.60 : x
  2. Step 2: Convert to fraction form
    81,748.12/122,627.37 = 21,775.60/x
  3. Step 3: Cross multiply
    81,748.12x = 122,627.37 × 21,775.60
  4. Step 4: Simplify right side
    81,748.12x = 2,670,284,558.17
  5. Step 5: Solve for x
    x = 2,670,284,558.17/81,748.12
  6. Step 6: Final answer
    x = 32,664.78

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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.