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Finding the Fourth Proportional to 168,855.21, 253,283.13 and 69,015.33

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Solution

The fourth proportional to 168,855.21, 253,283.13 and 69,015.33 is: 103,523.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,855.21 : 253,283.13 = 69,015.33 : x
  2. Step 2: Convert to fraction form
    168,855.21/253,283.13 = 69,015.33/x
  3. Step 3: Cross multiply
    168,855.21x = 253,283.13 × 69,015.33
  4. Step 4: Simplify right side
    168,855.21x = 17,480,418,800.38
  5. Step 5: Solve for x
    x = 17,480,418,800.38/168,855.21
  6. Step 6: Final answer
    x = 103,523.12

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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.