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Finding the Fourth Proportional to 129,626.80, 194,440.20 and 120,878.80

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Solution

The fourth proportional to 129,626.80, 194,440.20 and 120,878.80 is: 181,318.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,626.80 : 194,440.20 = 120,878.80 : x
  2. Step 2: Convert to fraction form
    129,626.80/194,440.20 = 120,878.80/x
  3. Step 3: Cross multiply
    129,626.80x = 194,440.20 × 120,878.80
  4. Step 4: Simplify right side
    129,626.80x = 23,503,698,047.76
  5. Step 5: Solve for x
    x = 23,503,698,047.76/129,626.80
  6. Step 6: Final answer
    x = 181,318.20

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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.