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Finding the Fourth Proportional to 149,661.39, 206,478.55 and 115,216.64

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Solution

The fourth proportional to 149,661.39, 206,478.55 and 115,216.64 is: 158,957.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,661.39 : 206,478.55 = 115,216.64 : x
  2. Step 2: Convert to fraction form
    149,661.39/206,478.55 = 115,216.64/x
  3. Step 3: Cross multiply
    149,661.39x = 206,478.55 × 115,216.64
  4. Step 4: Simplify right side
    149,661.39x = 23,789,764,763.07
  5. Step 5: Solve for x
    x = 23,789,764,763.07/149,661.39
  6. Step 6: Final answer
    x = 158,957.26

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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.