Home / 139,271.87-192,195.99-81,913.61

Finding the Fourth Proportional to 139,271.87, 192,195.99 and 81,913.61

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Solution

The fourth proportional to 139,271.87, 192,195.99 and 81,913.61 is: 113,041.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,271.87 : 192,195.99 = 81,913.61 : x
  2. Step 2: Convert to fraction form
    139,271.87/192,195.99 = 81,913.61/x
  3. Step 3: Cross multiply
    139,271.87x = 192,195.99 × 81,913.61
  4. Step 4: Simplify right side
    139,271.87x = 15,743,467,848.91
  5. Step 5: Solve for x
    x = 15,743,467,848.91/139,271.87
  6. Step 6: Final answer
    x = 113,041.26

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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.