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Finding the Fourth Proportional to 203,189.85, 280,389.62 and 112,540.41

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Solution

The fourth proportional to 203,189.85, 280,389.62 and 112,540.41 is: 155,298.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,189.85 : 280,389.62 = 112,540.41 : x
  2. Step 2: Convert to fraction form
    203,189.85/280,389.62 = 112,540.41/x
  3. Step 3: Cross multiply
    203,189.85x = 280,389.62 × 112,540.41
  4. Step 4: Simplify right side
    203,189.85x = 31,555,163,075.90
  5. Step 5: Solve for x
    x = 31,555,163,075.90/203,189.85
  6. Step 6: Final answer
    x = 155,298.91

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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.