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Finding the Fourth Proportional to 203,973.64, 305,791.98 and 90,040.30

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Solution

The fourth proportional to 203,973.64, 305,791.98 and 90,040.30 is: 134,986.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,973.64 : 305,791.98 = 90,040.30 : x
  2. Step 2: Convert to fraction form
    203,973.64/305,791.98 = 90,040.30/x
  3. Step 3: Cross multiply
    203,973.64x = 305,791.98 × 90,040.30
  4. Step 4: Simplify right side
    203,973.64x = 27,533,601,616.79
  5. Step 5: Solve for x
    x = 27,533,601,616.79/203,973.64
  6. Step 6: Final answer
    x = 134,986.08

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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.