Home / 208,763,981,325.89-313,017,815,986.77-81,129,644,109.67

Finding the Fourth Proportional to 208,763,981,325.89, 313,017,815,986.77 and 81,129,644,109.67

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Solution

The fourth proportional to 208,763,981,325.89, 313,017,815,986.77 and 81,129,644,109.67 is: 121,644,662,310.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,763,981,325.89 : 313,017,815,986.77 = 81,129,644,109.67 : x
  2. Step 2: Convert to fraction form
    208,763,981,325.89/313,017,815,986.77 = 81,129,644,109.67/x
  3. Step 3: Cross multiply
    208,763,981,325.89x = 313,017,815,986.77 × 81,129,644,109.67
  4. Step 4: Simplify right side
    208,763,981,325.89x = 25,395,024,010,991,256,993,792
  5. Step 5: Solve for x
    x = 25,395,024,010,991,256,993,792/208,763,981,325.89
  6. Step 6: Final answer
    x = 121,644,662,310.54

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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.