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Finding the Fourth Proportional to 139,365,504, 192,324,395.52 and 78,318,720

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Solution

The fourth proportional to 139,365,504, 192,324,395.52 and 78,318,720 is: 108,079,833.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,365,504 : 192,324,395.52 = 78,318,720 : x
  2. Step 2: Convert to fraction form
    139,365,504/192,324,395.52 = 78,318,720/x
  3. Step 3: Cross multiply
    139,365,504x = 192,324,395.52 × 78,318,720
  4. Step 4: Simplify right side
    139,365,504x = 15,062,600,481,900,136
  5. Step 5: Solve for x
    x = 15,062,600,481,900,136/139,365,504
  6. Step 6: Final answer
    x = 108,079,833.60

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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.