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Finding the Fourth Proportional to 139,808.53, 192,944.55 and 79,356.16

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Solution

The fourth proportional to 139,808.53, 192,944.55 and 79,356.16 is: 109,516.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,808.53 : 192,944.55 = 79,356.16 : x
  2. Step 2: Convert to fraction form
    139,808.53/192,944.55 = 79,356.16/x
  3. Step 3: Cross multiply
    139,808.53x = 192,944.55 × 79,356.16
  4. Step 4: Simplify right side
    139,808.53x = 15,311,338,580.93
  5. Step 5: Solve for x
    x = 15,311,338,580.93/139,808.53
  6. Step 6: Final answer
    x = 109,516.48

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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.