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Finding the Fourth Proportional to 268,749.36, 403,182.36 and 81,756

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Solution

The fourth proportional to 268,749.36, 403,182.36 and 81,756 is: 122,651.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,749.36 : 403,182.36 = 81,756 : x
  2. Step 2: Convert to fraction form
    268,749.36/403,182.36 = 81,756/x
  3. Step 3: Cross multiply
    268,749.36x = 403,182.36 × 81,756
  4. Step 4: Simplify right side
    268,749.36x = 32,962,577,024.16
  5. Step 5: Solve for x
    x = 32,962,577,024.16/268,749.36
  6. Step 6: Final answer
    x = 122,651.74

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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.