Home / 81,970.88-122,874.23-31,982.20

Finding the Fourth Proportional to 81,970.88, 122,874.23 and 31,982.20

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Solution

The fourth proportional to 81,970.88, 122,874.23 and 31,982.20 is: 47,941.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,970.88 : 122,874.23 = 31,982.20 : x
  2. Step 2: Convert to fraction form
    81,970.88/122,874.23 = 31,982.20/x
  3. Step 3: Cross multiply
    81,970.88x = 122,874.23 × 31,982.20
  4. Step 4: Simplify right side
    81,970.88x = 3,929,788,198.71
  5. Step 5: Solve for x
    x = 3,929,788,198.71/81,970.88
  6. Step 6: Final answer
    x = 47,941.27

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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.