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Finding the Fourth Proportional to 203,489.90, 305,161.95 and 103,616.90

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Solution

The fourth proportional to 203,489.90, 305,161.95 and 103,616.90 is: 155,388.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,489.90 : 305,161.95 = 103,616.90 : x
  2. Step 2: Convert to fraction form
    203,489.90/305,161.95 = 103,616.90/x
  3. Step 3: Cross multiply
    203,489.90x = 305,161.95 × 103,616.90
  4. Step 4: Simplify right side
    203,489.90x = 31,619,935,256.96
  5. Step 5: Solve for x
    x = 31,619,935,256.96/203,489.90
  6. Step 6: Final answer
    x = 155,388.23

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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.