Home / 81,683.98-122,478.39-31,705.69

Finding the Fourth Proportional to 81,683.98, 122,478.39 and 31,705.69

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Solution

The fourth proportional to 81,683.98, 122,478.39 and 31,705.69 is: 47,540.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,683.98 : 122,478.39 = 31,705.69 : x
  2. Step 2: Convert to fraction form
    81,683.98/122,478.39 = 31,705.69/x
  3. Step 3: Cross multiply
    81,683.98x = 122,478.39 × 31,705.69
  4. Step 4: Simplify right side
    81,683.98x = 3,883,261,558.84
  5. Step 5: Solve for x
    x = 3,883,261,558.84/81,683.98
  6. Step 6: Final answer
    x = 47,540.06

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1.5x scale

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.