Home / 121,891.08-168,218.46-68,193.36

Finding the Fourth Proportional to 121,891.08, 168,218.46 and 68,193.36

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Solution

The fourth proportional to 121,891.08, 168,218.46 and 68,193.36 is: 94,111.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,891.08 : 168,218.46 = 68,193.36 : x
  2. Step 2: Convert to fraction form
    121,891.08/168,218.46 = 68,193.36/x
  3. Step 3: Cross multiply
    121,891.08x = 168,218.46 × 68,193.36
  4. Step 4: Simplify right side
    121,891.08x = 11,471,382,001.43
  5. Step 5: Solve for x
    x = 11,471,382,001.43/121,891.08
  6. Step 6: Final answer
    x = 94,111.74

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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.