Home / 81,968.08-113,121.16-49,705.78

Finding the Fourth Proportional to 81,968.08, 113,121.16 and 49,705.78

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Solution

The fourth proportional to 81,968.08, 113,121.16 and 49,705.78 is: 68,597.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,968.08 : 113,121.16 = 49,705.78 : x
  2. Step 2: Convert to fraction form
    81,968.08/113,121.16 = 49,705.78/x
  3. Step 3: Cross multiply
    81,968.08x = 113,121.16 × 49,705.78
  4. Step 4: Simplify right side
    81,968.08x = 5,622,775,492.30
  5. Step 5: Solve for x
    x = 5,622,775,492.30/81,968.08
  6. Step 6: Final answer
    x = 68,597.14

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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.