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Finding the Fourth Proportional to 165,485.80, 248,331.30 and 86,656.60

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Solution

The fourth proportional to 165,485.80, 248,331.30 and 86,656.60 is: 130,038.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,485.80 : 248,331.30 = 86,656.60 : x
  2. Step 2: Convert to fraction form
    165,485.80/248,331.30 = 86,656.60/x
  3. Step 3: Cross multiply
    165,485.80x = 248,331.30 × 86,656.60
  4. Step 4: Simplify right side
    165,485.80x = 21,519,546,131.58
  5. Step 5: Solve for x
    x = 21,519,546,131.58/165,485.80
  6. Step 6: Final answer
    x = 130,038.63

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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.