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Finding the Fourth Proportional to 128,986.84, 193,487.00 and 39,027.27

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Solution

The fourth proportional to 128,986.84, 193,487.00 and 39,027.27 is: 58,542.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,986.84 : 193,487.00 = 39,027.27 : x
  2. Step 2: Convert to fraction form
    128,986.84/193,487.00 = 39,027.27/x
  3. Step 3: Cross multiply
    128,986.84x = 193,487.00 × 39,027.27
  4. Step 4: Simplify right side
    128,986.84x = 7,551,269,920.93
  5. Step 5: Solve for x
    x = 7,551,269,920.93/128,986.84
  6. Step 6: Final answer
    x = 58,542.95

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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.