Home / 280,136.97-420,148.76-102,583.35

Finding the Fourth Proportional to 280,136.97, 420,148.76 and 102,583.35

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Solution

The fourth proportional to 280,136.97, 420,148.76 and 102,583.35 is: 153,854.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,136.97 : 420,148.76 = 102,583.35 : x
  2. Step 2: Convert to fraction form
    280,136.97/420,148.76 = 102,583.35/x
  3. Step 3: Cross multiply
    280,136.97x = 420,148.76 × 102,583.35
  4. Step 4: Simplify right side
    280,136.97x = 43,100,266,786.23
  5. Step 5: Solve for x
    x = 43,100,266,786.23/280,136.97
  6. Step 6: Final answer
    x = 153,854.26

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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.