Home / 222,135.78-306,555.03-121,533.78

Finding the Fourth Proportional to 222,135.78, 306,555.03 and 121,533.78

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Solution

The fourth proportional to 222,135.78, 306,555.03 and 121,533.78 is: 167,720.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    222,135.78 : 306,555.03 = 121,533.78 : x
  2. Step 2: Convert to fraction form
    222,135.78/306,555.03 = 121,533.78/x
  3. Step 3: Cross multiply
    222,135.78x = 306,555.03 × 121,533.78
  4. Step 4: Simplify right side
    222,135.78x = 37,256,791,573.91
  5. Step 5: Solve for x
    x = 37,256,791,573.91/222,135.78
  6. Step 6: Final answer
    x = 167,720.80

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1.5x scale

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.