Home / 81,847.12-122,721.30-31,249.45

Finding the Fourth Proportional to 81,847.12, 122,721.30 and 31,249.45

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Solution

The fourth proportional to 81,847.12, 122,721.30 and 31,249.45 is: 46,855.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,847.12 : 122,721.30 = 31,249.45 : x
  2. Step 2: Convert to fraction form
    81,847.12/122,721.30 = 31,249.45/x
  3. Step 3: Cross multiply
    81,847.12x = 122,721.30 × 31,249.45
  4. Step 4: Simplify right side
    81,847.12x = 3,834,973,128.29
  5. Step 5: Solve for x
    x = 3,834,973,128.29/81,847.12
  6. Step 6: Final answer
    x = 46,855.32

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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.