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Finding the Fourth Proportional to 329,317.88, 493,978.03 and 79,999.88

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Solution

The fourth proportional to 329,317.88, 493,978.03 and 79,999.88 is: 120,000.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,317.88 : 493,978.03 = 79,999.88 : x
  2. Step 2: Convert to fraction form
    329,317.88/493,978.03 = 79,999.88/x
  3. Step 3: Cross multiply
    329,317.88x = 493,978.03 × 79,999.88
  4. Step 4: Simplify right side
    329,317.88x = 39,518,180,452.75
  5. Step 5: Solve for x
    x = 39,518,180,452.75/329,317.88
  6. Step 6: Final answer
    x = 120,000.11

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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.