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Finding the Fourth Proportional to 121,998.99, 168,358.57 and 68,284

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Solution

The fourth proportional to 121,998.99, 168,358.57 and 68,284 is: 94,231.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,998.99 : 168,358.57 = 68,284 : x
  2. Step 2: Convert to fraction form
    121,998.99/168,358.57 = 68,284/x
  3. Step 3: Cross multiply
    121,998.99x = 168,358.57 × 68,284
  4. Step 4: Simplify right side
    121,998.99x = 11,496,196,593.88
  5. Step 5: Solve for x
    x = 11,496,196,593.88/121,998.99
  6. Step 6: Final answer
    x = 94,231.90

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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.