Home / 217,905.80-300,738.02-122,412.60

Finding the Fourth Proportional to 217,905.80, 300,738.02 and 122,412.60

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Solution

The fourth proportional to 217,905.80, 300,738.02 and 122,412.60 is: 168,945.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,905.80 : 300,738.02 = 122,412.60 : x
  2. Step 2: Convert to fraction form
    217,905.80/300,738.02 = 122,412.60/x
  3. Step 3: Cross multiply
    217,905.80x = 300,738.02 × 122,412.60
  4. Step 4: Simplify right side
    217,905.80x = 36,814,122,334.99
  5. Step 5: Solve for x
    x = 36,814,122,334.99/217,905.80
  6. Step 6: Final answer
    x = 168,945.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.