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Finding the Fourth Proportional to 69,392, 104,090.88 and 20,144

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Solution

The fourth proportional to 69,392, 104,090.88 and 20,144 is: 30,216.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,392 : 104,090.88 = 20,144 : x
  2. Step 2: Convert to fraction form
    69,392/104,090.88 = 20,144/x
  3. Step 3: Cross multiply
    69,392x = 104,090.88 × 20,144
  4. Step 4: Simplify right side
    69,392x = 2,096,806,686.72
  5. Step 5: Solve for x
    x = 2,096,806,686.72/69,392
  6. Step 6: Final answer
    x = 30,216.84

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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.