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Finding the Fourth Proportional to 202,271.80, 303,407.70 and 139,286.20

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Solution

The fourth proportional to 202,271.80, 303,407.70 and 139,286.20 is: 208,929.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,271.80 : 303,407.70 = 139,286.20 : x
  2. Step 2: Convert to fraction form
    202,271.80/303,407.70 = 139,286.20/x
  3. Step 3: Cross multiply
    202,271.80x = 303,407.70 × 139,286.20
  4. Step 4: Simplify right side
    202,271.80x = 42,260,505,583.74
  5. Step 5: Solve for x
    x = 42,260,505,583.74/202,271.80
  6. Step 6: Final answer
    x = 208,929.30

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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.