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Finding the Fourth Proportional to 81,685,809.90, 114,647,112 and 81,685,809.90

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Solution

The fourth proportional to 81,685,809.90, 114,647,112 and 81,685,809.90 is: 114,647,112

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,685,809.90 : 114,647,112 = 81,685,809.90 : x
  2. Step 2: Convert to fraction form
    81,685,809.90/114,647,112 = 81,685,809.90/x
  3. Step 3: Cross multiply
    81,685,809.90x = 114,647,112 × 81,685,809.90
  4. Step 4: Simplify right side
    81,685,809.90x = 9,365,042,196,416,010
  5. Step 5: Solve for x
    x = 9,365,042,196,416,010/81,685,809.90
  6. Step 6: Final answer
    x = 114,647,112

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.