Home / 81,871.86-122,813.44-31,935.36

Finding the Fourth Proportional to 81,871.86, 122,813.44 and 31,935.36

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Solution

The fourth proportional to 81,871.86, 122,813.44 and 31,935.36 is: 47,905.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,871.86 : 122,813.44 = 31,935.36 : x
  2. Step 2: Convert to fraction form
    81,871.86/122,813.44 = 31,935.36/x
  3. Step 3: Cross multiply
    81,871.86x = 122,813.44 × 31,935.36
  4. Step 4: Simplify right side
    81,871.86x = 3,922,091,419.24
  5. Step 5: Solve for x
    x = 3,922,091,419.24/81,871.86
  6. Step 6: Final answer
    x = 47,905.24

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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.