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Finding the Fourth Proportional to 165,399.60, 248,131.80 and 70,629.60

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Solution

The fourth proportional to 165,399.60, 248,131.80 and 70,629.60 is: 105,958.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,399.60 : 248,131.80 = 70,629.60 : x
  2. Step 2: Convert to fraction form
    165,399.60/248,131.80 = 70,629.60/x
  3. Step 3: Cross multiply
    165,399.60x = 248,131.80 × 70,629.60
  4. Step 4: Simplify right side
    165,399.60x = 17,525,449,781.28
  5. Step 5: Solve for x
    x = 17,525,449,781.28/165,399.60
  6. Step 6: Final answer
    x = 105,958.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.