Home / 280,119.53-420,179.06-102,640.43

Finding the Fourth Proportional to 280,119.53, 420,179.06 and 102,640.43

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Solution

The fourth proportional to 280,119.53, 420,179.06 and 102,640.43 is: 153,960.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,119.53 : 420,179.06 = 102,640.43 : x
  2. Step 2: Convert to fraction form
    280,119.53/420,179.06 = 102,640.43/x
  3. Step 3: Cross multiply
    280,119.53x = 420,179.06 × 102,640.43
  4. Step 4: Simplify right side
    280,119.53x = 43,127,360,702.44
  5. Step 5: Solve for x
    x = 43,127,360,702.44/280,119.53
  6. Step 6: Final answer
    x = 153,960.56

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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.