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Finding the Fourth Proportional to 203,609.36, 305,533.56 and 85,271.60

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Solution

The fourth proportional to 203,609.36, 305,533.56 and 85,271.60 is: 127,957.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,609.36 : 305,533.56 = 85,271.60 : x
  2. Step 2: Convert to fraction form
    203,609.36/305,533.56 = 85,271.60/x
  3. Step 3: Cross multiply
    203,609.36x = 305,533.56 × 85,271.60
  4. Step 4: Simplify right side
    203,609.36x = 26,053,335,514.90
  5. Step 5: Solve for x
    x = 26,053,335,514.90/203,609.36
  6. Step 6: Final answer
    x = 127,957.45

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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.