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Finding the Fourth Proportional to 165,486.80, 248,332.80 and 86,657.60

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Solution

The fourth proportional to 165,486.80, 248,332.80 and 86,657.60 is: 130,040.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,486.80 : 248,332.80 = 86,657.60 : x
  2. Step 2: Convert to fraction form
    165,486.80/248,332.80 = 86,657.60/x
  3. Step 3: Cross multiply
    165,486.80x = 248,332.80 × 86,657.60
  4. Step 4: Simplify right side
    165,486.80x = 21,519,924,449.28
  5. Step 5: Solve for x
    x = 21,519,924,449.28/165,486.80
  6. Step 6: Final answer
    x = 130,040.13

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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.