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Finding the Fourth Proportional to 424,667.68, 637,093.68 and 129,172

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Solution

The fourth proportional to 424,667.68, 637,093.68 and 129,172 is: 193,786.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,667.68 : 637,093.68 = 129,172 : x
  2. Step 2: Convert to fraction form
    424,667.68/637,093.68 = 129,172/x
  3. Step 3: Cross multiply
    424,667.68x = 637,093.68 × 129,172
  4. Step 4: Simplify right side
    424,667.68x = 82,294,664,832.96
  5. Step 5: Solve for x
    x = 82,294,664,832.96/424,667.68
  6. Step 6: Final answer
    x = 193,786.03

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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.