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Finding the Fourth Proportional to 121,739.94, 168,001.94 and 68,027.22

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Solution

The fourth proportional to 121,739.94, 168,001.94 and 68,027.22 is: 93,878.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,739.94 : 168,001.94 = 68,027.22 : x
  2. Step 2: Convert to fraction form
    121,739.94/168,001.94 = 68,027.22/x
  3. Step 3: Cross multiply
    121,739.94x = 168,001.94 × 68,027.22
  4. Step 4: Simplify right side
    121,739.94x = 11,428,704,932.81
  5. Step 5: Solve for x
    x = 11,428,704,932.81/121,739.94
  6. Step 6: Final answer
    x = 93,878.02

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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.