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Finding the Fourth Proportional to 171,226.76, 256,491.96 and 139,749

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Solution

The fourth proportional to 171,226.76, 256,491.96 and 139,749 is: 209,339.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,226.76 : 256,491.96 = 139,749 : x
  2. Step 2: Convert to fraction form
    171,226.76/256,491.96 = 139,749/x
  3. Step 3: Cross multiply
    171,226.76x = 256,491.96 × 139,749
  4. Step 4: Simplify right side
    171,226.76x = 35,844,494,918.04
  5. Step 5: Solve for x
    x = 35,844,494,918.04/171,226.76
  6. Step 6: Final answer
    x = 209,339.33

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1.5x scale

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.