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Finding the Fourth Proportional to 129,920.80, 194,735.40 and 55,028.20

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Solution

The fourth proportional to 129,920.80, 194,735.40 and 55,028.20 is: 82,480.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,920.80 : 194,735.40 = 55,028.20 : x
  2. Step 2: Convert to fraction form
    129,920.80/194,735.40 = 55,028.20/x
  3. Step 3: Cross multiply
    129,920.80x = 194,735.40 × 55,028.20
  4. Step 4: Simplify right side
    129,920.80x = 10,715,938,538.28
  5. Step 5: Solve for x
    x = 10,715,938,538.28/129,920.80
  6. Step 6: Final answer
    x = 82,480.55

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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.