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Finding the Fourth Proportional to 139,796.64, 192,924 and 79,369.92

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Solution

The fourth proportional to 139,796.64, 192,924 and 79,369.92 is: 109,533.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,796.64 : 192,924 = 79,369.92 : x
  2. Step 2: Convert to fraction form
    139,796.64/192,924 = 79,369.92/x
  3. Step 3: Cross multiply
    139,796.64x = 192,924 × 79,369.92
  4. Step 4: Simplify right side
    139,796.64x = 15,312,362,446.08
  5. Step 5: Solve for x
    x = 15,312,362,446.08/139,796.64
  6. Step 6: Final answer
    x = 109,533.12

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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.