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Finding the Fourth Proportional to 158,608.17, 218,858.99 and 90,629.55

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Solution

The fourth proportional to 158,608.17, 218,858.99 and 90,629.55 is: 125,057.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,608.17 : 218,858.99 = 90,629.55 : x
  2. Step 2: Convert to fraction form
    158,608.17/218,858.99 = 90,629.55/x
  3. Step 3: Cross multiply
    158,608.17x = 218,858.99 × 90,629.55
  4. Step 4: Simplify right side
    158,608.17x = 19,835,091,324.01
  5. Step 5: Solve for x
    x = 19,835,091,324.01/158,608.17
  6. Step 6: Final answer
    x = 125,057.19

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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.