Home / 280,788.53-421,372.33-109,989.06

Finding the Fourth Proportional to 280,788.53, 421,372.33 and 109,989.06

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Solution

The fourth proportional to 280,788.53, 421,372.33 and 109,989.06 is: 165,057.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,788.53 : 421,372.33 = 109,989.06 : x
  2. Step 2: Convert to fraction form
    280,788.53/421,372.33 = 109,989.06/x
  3. Step 3: Cross multiply
    280,788.53x = 421,372.33 × 109,989.06
  4. Step 4: Simplify right side
    280,788.53x = 46,346,348,186.92
  5. Step 5: Solve for x
    x = 46,346,348,186.92/280,788.53
  6. Step 6: Final answer
    x = 165,057.84

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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.