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Finding the Fourth Proportional to 81,100.44, 111,917.43 and 45,290.07

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Solution

The fourth proportional to 81,100.44, 111,917.43 and 45,290.07 is: 62,499.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,100.44 : 111,917.43 = 45,290.07 : x
  2. Step 2: Convert to fraction form
    81,100.44/111,917.43 = 45,290.07/x
  3. Step 3: Cross multiply
    81,100.44x = 111,917.43 × 45,290.07
  4. Step 4: Simplify right side
    81,100.44x = 5,068,748,238.92
  5. Step 5: Solve for x
    x = 5,068,748,238.92/81,100.44
  6. Step 6: Final answer
    x = 62,499.64

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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.