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Finding the Fourth Proportional to 121,758.30, 168,025.96 and 68,043.30

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Solution

The fourth proportional to 121,758.30, 168,025.96 and 68,043.30 is: 93,899.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,758.30 : 168,025.96 = 68,043.30 : x
  2. Step 2: Convert to fraction form
    121,758.30/168,025.96 = 68,043.30/x
  3. Step 3: Cross multiply
    121,758.30x = 168,025.96 × 68,043.30
  4. Step 4: Simplify right side
    121,758.30x = 11,433,040,804.07
  5. Step 5: Solve for x
    x = 11,433,040,804.07/121,758.30
  6. Step 6: Final answer
    x = 93,899.48

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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.