Home / 139,231.24-192,137.04-78,813.34

Finding the Fourth Proportional to 139,231.24, 192,137.04 and 78,813.34

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Solution

The fourth proportional to 139,231.24, 192,137.04 and 78,813.34 is: 108,761.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,231.24 : 192,137.04 = 78,813.34 : x
  2. Step 2: Convert to fraction form
    139,231.24/192,137.04 = 78,813.34/x
  3. Step 3: Cross multiply
    139,231.24x = 192,137.04 × 78,813.34
  4. Step 4: Simplify right side
    139,231.24x = 15,142,961,860.11
  5. Step 5: Solve for x
    x = 15,142,961,860.11/139,231.24
  6. Step 6: Final answer
    x = 108,761.24

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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.