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Finding the Fourth Proportional to 268,703.76, 403,059.11 and 79,121.03

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Solution

The fourth proportional to 268,703.76, 403,059.11 and 79,121.03 is: 118,682.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,703.76 : 403,059.11 = 79,121.03 : x
  2. Step 2: Convert to fraction form
    268,703.76/403,059.11 = 79,121.03/x
  3. Step 3: Cross multiply
    268,703.76x = 403,059.11 × 79,121.03
  4. Step 4: Simplify right side
    268,703.76x = 31,890,449,523.18
  5. Step 5: Solve for x
    x = 31,890,449,523.18/268,703.76
  6. Step 6: Final answer
    x = 118,682.56

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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.