Home / 81,391.16-122,274.35-78,028.20

Finding the Fourth Proportional to 81,391.16, 122,274.35 and 78,028.20

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Solution

The fourth proportional to 81,391.16, 122,274.35 and 78,028.20 is: 117,222.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,391.16 : 122,274.35 = 78,028.20 : x
  2. Step 2: Convert to fraction form
    81,391.16/122,274.35 = 78,028.20/x
  3. Step 3: Cross multiply
    81,391.16x = 122,274.35 × 78,028.20
  4. Step 4: Simplify right side
    81,391.16x = 9,540,847,046.53
  5. Step 5: Solve for x
    x = 9,540,847,046.53/81,391.16
  6. Step 6: Final answer
    x = 117,222.16

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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.