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Finding the Fourth Proportional to 139,672.16, 192,751.95 and 79,245.35

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Solution

The fourth proportional to 139,672.16, 192,751.95 and 79,245.35 is: 109,361.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,672.16 : 192,751.95 = 79,245.35 : x
  2. Step 2: Convert to fraction form
    139,672.16/192,751.95 = 79,245.35/x
  3. Step 3: Cross multiply
    139,672.16x = 192,751.95 × 79,245.35
  4. Step 4: Simplify right side
    139,672.16x = 15,274,695,740.93
  5. Step 5: Solve for x
    x = 15,274,695,740.93/139,672.16
  6. Step 6: Final answer
    x = 109,361.06

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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.