Home / 139,721.84-192,786.24-83,122.16

Finding the Fourth Proportional to 139,721.84, 192,786.24 and 83,122.16

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Solution

The fourth proportional to 139,721.84, 192,786.24 and 83,122.16 is: 114,690.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,721.84 : 192,786.24 = 83,122.16 : x
  2. Step 2: Convert to fraction form
    139,721.84/192,786.24 = 83,122.16/x
  3. Step 3: Cross multiply
    139,721.84x = 192,786.24 × 83,122.16
  4. Step 4: Simplify right side
    139,721.84x = 16,024,808,687.08
  5. Step 5: Solve for x
    x = 16,024,808,687.08/139,721.84
  6. Step 6: Final answer
    x = 114,690.79

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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.