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Finding the Fourth Proportional to 129,797.60, 194,696.40 and 85,474.40

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Solution

The fourth proportional to 129,797.60, 194,696.40 and 85,474.40 is: 128,211.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,797.60 : 194,696.40 = 85,474.40 : x
  2. Step 2: Convert to fraction form
    129,797.60/194,696.40 = 85,474.40/x
  3. Step 3: Cross multiply
    129,797.60x = 194,696.40 × 85,474.40
  4. Step 4: Simplify right side
    129,797.60x = 16,641,557,972.16
  5. Step 5: Solve for x
    x = 16,641,557,972.16/129,797.60
  6. Step 6: Final answer
    x = 128,211.60

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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.