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Finding the Fourth Proportional to 165,454.80, 248,284.80 and 86,625.60

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Solution

The fourth proportional to 165,454.80, 248,284.80 and 86,625.60 is: 129,992.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,454.80 : 248,284.80 = 86,625.60 : x
  2. Step 2: Convert to fraction form
    165,454.80/248,284.80 = 86,625.60/x
  3. Step 3: Cross multiply
    165,454.80x = 248,284.80 × 86,625.60
  4. Step 4: Simplify right side
    165,454.80x = 21,507,819,770.88
  5. Step 5: Solve for x
    x = 21,507,819,770.88/165,454.80
  6. Step 6: Final answer
    x = 129,992.12

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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.