Home / 81,397.75-122,651.24-66,930.73

Finding the Fourth Proportional to 81,397.75, 122,651.24 and 66,930.73

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Solution

The fourth proportional to 81,397.75, 122,651.24 and 66,930.73 is: 100,852.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,397.75 : 122,651.24 = 66,930.73 : x
  2. Step 2: Convert to fraction form
    81,397.75/122,651.24 = 66,930.73/x
  3. Step 3: Cross multiply
    81,397.75x = 122,651.24 × 66,930.73
  4. Step 4: Simplify right side
    81,397.75x = 8,209,137,028.61
  5. Step 5: Solve for x
    x = 8,209,137,028.61/81,397.75
  6. Step 6: Final answer
    x = 100,852.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.