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Finding the Fourth Proportional to 81,074.70, 111,850.92 and 54,174.60

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Solution

The fourth proportional to 81,074.70, 111,850.92 and 54,174.60 is: 74,739.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,074.70 : 111,850.92 = 54,174.60 : x
  2. Step 2: Convert to fraction form
    81,074.70/111,850.92 = 54,174.60/x
  3. Step 3: Cross multiply
    81,074.70x = 111,850.92 × 54,174.60
  4. Step 4: Simplify right side
    81,074.70x = 6,059,478,850.63
  5. Step 5: Solve for x
    x = 6,059,478,850.63/81,074.70
  6. Step 6: Final answer
    x = 74,739.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.