Home / 81,045.23-121,583.60-31,121.66

Finding the Fourth Proportional to 81,045.23, 121,583.60 and 31,121.66

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Solution

The fourth proportional to 81,045.23, 121,583.60 and 31,121.66 is: 46,688.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,045.23 : 121,583.60 = 31,121.66 : x
  2. Step 2: Convert to fraction form
    81,045.23/121,583.60 = 31,121.66/x
  3. Step 3: Cross multiply
    81,045.23x = 121,583.60 × 31,121.66
  4. Step 4: Simplify right side
    81,045.23x = 3,783,883,234.62
  5. Step 5: Solve for x
    x = 3,783,883,234.62/81,045.23
  6. Step 6: Final answer
    x = 46,688.54

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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.