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Finding the Fourth Proportional to 139,990.53, 193,192.08 and 79,571.34

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Solution

The fourth proportional to 139,990.53, 193,192.08 and 79,571.34 is: 109,811.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,990.53 : 193,192.08 = 79,571.34 : x
  2. Step 2: Convert to fraction form
    139,990.53/193,192.08 = 79,571.34/x
  3. Step 3: Cross multiply
    139,990.53x = 193,192.08 × 79,571.34
  4. Step 4: Simplify right side
    139,990.53x = 15,372,552,682.99
  5. Step 5: Solve for x
    x = 15,372,552,682.99/139,990.53
  6. Step 6: Final answer
    x = 109,811.38

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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.