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Finding the Fourth Proportional to 106,979.60, 160,469.40 and 76,912.40

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Solution

The fourth proportional to 106,979.60, 160,469.40 and 76,912.40 is: 115,368.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,979.60 : 160,469.40 = 76,912.40 : x
  2. Step 2: Convert to fraction form
    106,979.60/160,469.40 = 76,912.40/x
  3. Step 3: Cross multiply
    106,979.60x = 160,469.40 × 76,912.40
  4. Step 4: Simplify right side
    106,979.60x = 12,342,086,680.56
  5. Step 5: Solve for x
    x = 12,342,086,680.56/106,979.60
  6. Step 6: Final answer
    x = 115,368.60

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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.