Home / 45,687.45-68,522.79-20,721.50

Finding the Fourth Proportional to 45,687.45, 68,522.79 and 20,721.50

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Solution

The fourth proportional to 45,687.45, 68,522.79 and 20,721.50 is: 31,078.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,687.45 : 68,522.79 = 20,721.50 : x
  2. Step 2: Convert to fraction form
    45,687.45/68,522.79 = 20,721.50/x
  3. Step 3: Cross multiply
    45,687.45x = 68,522.79 × 20,721.50
  4. Step 4: Simplify right side
    45,687.45x = 1,419,894,992.99
  5. Step 5: Solve for x
    x = 1,419,894,992.99/45,687.45
  6. Step 6: Final answer
    x = 31,078.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.