Home / 81,902.30-122,828.67-31,968.86

Finding the Fourth Proportional to 81,902.30, 122,828.67 and 31,968.86

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Solution

The fourth proportional to 81,902.30, 122,828.67 and 31,968.86 is: 47,943.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,902.30 : 122,828.67 = 31,968.86 : x
  2. Step 2: Convert to fraction form
    81,902.30/122,828.67 = 31,968.86/x
  3. Step 3: Cross multiply
    81,902.30x = 122,828.67 × 31,968.86
  4. Step 4: Simplify right side
    81,902.30x = 3,926,692,555.22
  5. Step 5: Solve for x
    x = 3,926,692,555.22/81,902.30
  6. Step 6: Final answer
    x = 47,943.62

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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.