Home / 81,782.58-122,623.63-31,804.41

Finding the Fourth Proportional to 81,782.58, 122,623.63 and 31,804.41

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Solution

The fourth proportional to 81,782.58, 122,623.63 and 31,804.41 is: 47,687.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,782.58 : 122,623.63 = 31,804.41 : x
  2. Step 2: Convert to fraction form
    81,782.58/122,623.63 = 31,804.41/x
  3. Step 3: Cross multiply
    81,782.58x = 122,623.63 × 31,804.41
  4. Step 4: Simplify right side
    81,782.58x = 3,899,972,089.58
  5. Step 5: Solve for x
    x = 3,899,972,089.58/81,782.58
  6. Step 6: Final answer
    x = 47,687.08

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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.