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Finding the Fourth Proportional to 139,672.58, 192,752.54 and 79,245.77

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Solution

The fourth proportional to 139,672.58, 192,752.54 and 79,245.77 is: 109,361.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,672.58 : 192,752.54 = 79,245.77 : x
  2. Step 2: Convert to fraction form
    139,672.58/192,752.54 = 79,245.77/x
  3. Step 3: Cross multiply
    139,672.58x = 192,752.54 × 79,245.77
  4. Step 4: Simplify right side
    139,672.58x = 15,274,823,451.76
  5. Step 5: Solve for x
    x = 15,274,823,451.76/139,672.58
  6. Step 6: Final answer
    x = 109,361.65

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1.5x scale

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.