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Finding the Fourth Proportional to 159,954.36, 220,635.64 and 121,629.89

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Solution

The fourth proportional to 159,954.36, 220,635.64 and 121,629.89 is: 167,772.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,954.36 : 220,635.64 = 121,629.89 : x
  2. Step 2: Convert to fraction form
    159,954.36/220,635.64 = 121,629.89/x
  3. Step 3: Cross multiply
    159,954.36x = 220,635.64 × 121,629.89
  4. Step 4: Simplify right side
    159,954.36x = 26,835,888,623.28
  5. Step 5: Solve for x
    x = 26,835,888,623.28/159,954.36
  6. Step 6: Final answer
    x = 167,772.16

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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.