Home / 81,913.44-122,815.89-31,998.27

Finding the Fourth Proportional to 81,913.44, 122,815.89 and 31,998.27

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Solution

The fourth proportional to 81,913.44, 122,815.89 and 31,998.27 is: 47,976.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,913.44 : 122,815.89 = 31,998.27 : x
  2. Step 2: Convert to fraction form
    81,913.44/122,815.89 = 31,998.27/x
  3. Step 3: Cross multiply
    81,913.44x = 122,815.89 × 31,998.27
  4. Step 4: Simplify right side
    81,913.44x = 3,929,896,008.51
  5. Step 5: Solve for x
    x = 3,929,896,008.51/81,913.44
  6. Step 6: Final answer
    x = 47,976.21

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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.