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Finding the Fourth Proportional to 136,891,188.50, 188,909,840.13 and 81,889,363.22

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Solution

The fourth proportional to 136,891,188.50, 188,909,840.13 and 81,889,363.22 is: 113,007,321.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,891,188.50 : 188,909,840.13 = 81,889,363.22 : x
  2. Step 2: Convert to fraction form
    136,891,188.50/188,909,840.13 = 81,889,363.22/x
  3. Step 3: Cross multiply
    136,891,188.50x = 188,909,840.13 × 81,889,363.22
  4. Step 4: Simplify right side
    136,891,188.50x = 15,469,706,514,237,702
  5. Step 5: Solve for x
    x = 15,469,706,514,237,702/136,891,188.50
  6. Step 6: Final answer
    x = 113,007,321.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.