Home / 139,409.24-192,397.30-78,994.58

Finding the Fourth Proportional to 139,409.24, 192,397.30 and 78,994.58

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Solution

The fourth proportional to 139,409.24, 192,397.30 and 78,994.58 is: 109,019.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,409.24 : 192,397.30 = 78,994.58 : x
  2. Step 2: Convert to fraction form
    139,409.24/192,397.30 = 78,994.58/x
  3. Step 3: Cross multiply
    139,409.24x = 192,397.30 × 78,994.58
  4. Step 4: Simplify right side
    139,409.24x = 15,198,343,906.63
  5. Step 5: Solve for x
    x = 15,198,343,906.63/139,409.24
  6. Step 6: Final answer
    x = 109,019.63

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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.