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Finding the Fourth Proportional to 82,168.65, 113,362.47 and 53,912.61

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Solution

The fourth proportional to 82,168.65, 113,362.47 and 53,912.61 is: 74,379.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,168.65 : 113,362.47 = 53,912.61 : x
  2. Step 2: Convert to fraction form
    82,168.65/113,362.47 = 53,912.61/x
  3. Step 3: Cross multiply
    82,168.65x = 113,362.47 × 53,912.61
  4. Step 4: Simplify right side
    82,168.65x = 6,111,666,633.75
  5. Step 5: Solve for x
    x = 6,111,666,633.75/82,168.65
  6. Step 6: Final answer
    x = 74,379.54

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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.