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Finding the Fourth Proportional to 121,788.88, 168,047.16 and 68,056.72

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Solution

The fourth proportional to 121,788.88, 168,047.16 and 68,056.72 is: 93,906.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,788.88 : 168,047.16 = 68,056.72 : x
  2. Step 2: Convert to fraction form
    121,788.88/168,047.16 = 68,056.72/x
  3. Step 3: Cross multiply
    121,788.88x = 168,047.16 × 68,056.72
  4. Step 4: Simplify right side
    121,788.88x = 11,436,738,514.92
  5. Step 5: Solve for x
    x = 11,436,738,514.92/121,788.88
  6. Step 6: Final answer
    x = 93,906.26

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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.