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Finding the Fourth Proportional to 121,994.64, 168,355.62 and 68,279.22

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Solution

The fourth proportional to 121,994.64, 168,355.62 and 68,279.22 is: 94,227.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,994.64 : 168,355.62 = 68,279.22 : x
  2. Step 2: Convert to fraction form
    121,994.64/168,355.62 = 68,279.22/x
  3. Step 3: Cross multiply
    121,994.64x = 168,355.62 × 68,279.22
  4. Step 4: Simplify right side
    121,994.64x = 11,495,190,416.22
  5. Step 5: Solve for x
    x = 11,495,190,416.22/121,994.64
  6. Step 6: Final answer
    x = 94,227.01

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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.