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Finding the Fourth Proportional to 122,361.89, 168,892.43 and 79,919.51

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Solution

The fourth proportional to 122,361.89, 168,892.43 and 79,919.51 is: 110,310.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,361.89 : 168,892.43 = 79,919.51 : x
  2. Step 2: Convert to fraction form
    122,361.89/168,892.43 = 79,919.51/x
  3. Step 3: Cross multiply
    122,361.89x = 168,892.43 × 79,919.51
  4. Step 4: Simplify right side
    122,361.89x = 13,497,799,004.25
  5. Step 5: Solve for x
    x = 13,497,799,004.25/122,361.89
  6. Step 6: Final answer
    x = 110,310.49

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1.5x scale

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.