Home / 81,745.34-122,623.47-31,822.20

Finding the Fourth Proportional to 81,745.34, 122,623.47 and 31,822.20

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Solution

The fourth proportional to 81,745.34, 122,623.47 and 31,822.20 is: 47,735.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,745.34 : 122,623.47 = 31,822.20 : x
  2. Step 2: Convert to fraction form
    81,745.34/122,623.47 = 31,822.20/x
  3. Step 3: Cross multiply
    81,745.34x = 122,623.47 × 31,822.20
  4. Step 4: Simplify right side
    81,745.34x = 3,902,148,587.03
  5. Step 5: Solve for x
    x = 3,902,148,587.03/81,745.34
  6. Step 6: Final answer
    x = 47,735.43

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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.