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Finding the Fourth Proportional to 140,641.80, 194,085.36 and 76,979.04

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Solution

The fourth proportional to 140,641.80, 194,085.36 and 76,979.04 is: 106,230.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,641.80 : 194,085.36 = 76,979.04 : x
  2. Step 2: Convert to fraction form
    140,641.80/194,085.36 = 76,979.04/x
  3. Step 3: Cross multiply
    140,641.80x = 194,085.36 × 76,979.04
  4. Step 4: Simplify right side
    140,641.80x = 14,940,504,690.85
  5. Step 5: Solve for x
    x = 14,940,504,690.85/140,641.80
  6. Step 6: Final answer
    x = 106,230.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.