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Finding the Fourth Proportional to 139,599.16, 192,645.90 and 79,181.56

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Solution

The fourth proportional to 139,599.16, 192,645.90 and 79,181.56 is: 109,270.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,599.16 : 192,645.90 = 79,181.56 : x
  2. Step 2: Convert to fraction form
    139,599.16/192,645.90 = 79,181.56/x
  3. Step 3: Cross multiply
    139,599.16x = 192,645.90 × 79,181.56
  4. Step 4: Simplify right side
    139,599.16x = 15,254,002,889.60
  5. Step 5: Solve for x
    x = 15,254,002,889.60/139,599.16
  6. Step 6: Final answer
    x = 109,270.02

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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.