Home / 281,288.30-421,844.36-81,622.49

Finding the Fourth Proportional to 281,288.30, 421,844.36 and 81,622.49

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Solution

The fourth proportional to 281,288.30, 421,844.36 and 81,622.49 is: 122,408.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,288.30 : 421,844.36 = 81,622.49 : x
  2. Step 2: Convert to fraction form
    281,288.30/421,844.36 = 81,622.49/x
  3. Step 3: Cross multiply
    281,288.30x = 421,844.36 × 81,622.49
  4. Step 4: Simplify right side
    281,288.30x = 34,431,984,538.32
  5. Step 5: Solve for x
    x = 34,431,984,538.32/281,288.30
  6. Step 6: Final answer
    x = 122,408.17

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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.