Home / 280,949.58-421,361.10-81,225.54

Finding the Fourth Proportional to 280,949.58, 421,361.10 and 81,225.54

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Solution

The fourth proportional to 280,949.58, 421,361.10 and 81,225.54 is: 121,820.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,949.58 : 421,361.10 = 81,225.54 : x
  2. Step 2: Convert to fraction form
    280,949.58/421,361.10 = 81,225.54/x
  3. Step 3: Cross multiply
    280,949.58x = 421,361.10 × 81,225.54
  4. Step 4: Simplify right side
    280,949.58x = 34,225,282,882.49
  5. Step 5: Solve for x
    x = 34,225,282,882.49/280,949.58
  6. Step 6: Final answer
    x = 121,820.02

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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.