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Finding the Fourth Proportional to 139,768.32, 192,832.32 and 79,334.40

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Solution

The fourth proportional to 139,768.32, 192,832.32 and 79,334.40 is: 109,454.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,768.32 : 192,832.32 = 79,334.40 : x
  2. Step 2: Convert to fraction form
    139,768.32/192,832.32 = 79,334.40/x
  3. Step 3: Cross multiply
    139,768.32x = 192,832.32 × 79,334.40
  4. Step 4: Simplify right side
    139,768.32x = 15,298,236,407.81
  5. Step 5: Solve for x
    x = 15,298,236,407.81/139,768.32
  6. Step 6: Final answer
    x = 109,454.25

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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.