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Finding the Fourth Proportional to 165,969,985.80, 248,954,978.70 and 161,187,016.80

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Solution

The fourth proportional to 165,969,985.80, 248,954,978.70 and 161,187,016.80 is: 241,780,525.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,969,985.80 : 248,954,978.70 = 161,187,016.80 : x
  2. Step 2: Convert to fraction form
    165,969,985.80/248,954,978.70 = 161,187,016.80/x
  3. Step 3: Cross multiply
    165,969,985.80x = 248,954,978.70 × 161,187,016.80
  4. Step 4: Simplify right side
    165,969,985.80x = 40,128,310,334,160,544
  5. Step 5: Solve for x
    x = 40,128,310,334,160,544/165,969,985.80
  6. Step 6: Final answer
    x = 241,780,525.20

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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.