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Finding the Fourth Proportional to 49,989.75, 68,990.12 and 28,486.06

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Solution

The fourth proportional to 49,989.75, 68,990.12 and 28,486.06 is: 39,313.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,989.75 : 68,990.12 = 28,486.06 : x
  2. Step 2: Convert to fraction form
    49,989.75/68,990.12 = 28,486.06/x
  3. Step 3: Cross multiply
    49,989.75x = 68,990.12 × 28,486.06
  4. Step 4: Simplify right side
    49,989.75x = 1,965,256,697.73
  5. Step 5: Solve for x
    x = 1,965,256,697.73/49,989.75
  6. Step 6: Final answer
    x = 39,313.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.