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Finding the Fourth Proportional to 328,745.25, 493,131.98 and 129,108.80

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Solution

The fourth proportional to 328,745.25, 493,131.98 and 129,108.80 is: 193,668.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,745.25 : 493,131.98 = 129,108.80 : x
  2. Step 2: Convert to fraction form
    328,745.25/493,131.98 = 129,108.80/x
  3. Step 3: Cross multiply
    328,745.25x = 493,131.98 × 129,108.80
  4. Step 4: Simplify right side
    328,745.25x = 63,667,679,735.03
  5. Step 5: Solve for x
    x = 63,667,679,735.03/328,745.25
  6. Step 6: Final answer
    x = 193,668.74

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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.