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Finding the Fourth Proportional to 203,559.21, 280,916.21 and 112,912.22

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Solution

The fourth proportional to 203,559.21, 280,916.21 and 112,912.22 is: 155,821.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,559.21 : 280,916.21 = 112,912.22 : x
  2. Step 2: Convert to fraction form
    203,559.21/280,916.21 = 112,912.22/x
  3. Step 3: Cross multiply
    203,559.21x = 280,916.21 × 112,912.22
  4. Step 4: Simplify right side
    203,559.21x = 31,718,873,889.66
  5. Step 5: Solve for x
    x = 31,718,873,889.66/203,559.21
  6. Step 6: Final answer
    x = 155,821.36

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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.