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Finding the Fourth Proportional to 212,804.83, 318,644.09 and 128,452.24

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Solution

The fourth proportional to 212,804.83, 318,644.09 and 128,452.24 is: 192,338.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,804.83 : 318,644.09 = 128,452.24 : x
  2. Step 2: Convert to fraction form
    212,804.83/318,644.09 = 128,452.24/x
  3. Step 3: Cross multiply
    212,804.83x = 318,644.09 × 128,452.24
  4. Step 4: Simplify right side
    212,804.83x = 40,930,545,684.39
  5. Step 5: Solve for x
    x = 40,930,545,684.39/212,804.83
  6. Step 6: Final answer
    x = 192,338.43

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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.