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Finding the Fourth Proportional to 70,690.62, 106,032.57 and 20,768.70

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Solution

The fourth proportional to 70,690.62, 106,032.57 and 20,768.70 is: 31,152.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,690.62 : 106,032.57 = 20,768.70 : x
  2. Step 2: Convert to fraction form
    70,690.62/106,032.57 = 20,768.70/x
  3. Step 3: Cross multiply
    70,690.62x = 106,032.57 × 20,768.70
  4. Step 4: Simplify right side
    70,690.62x = 2,202,158,636.56
  5. Step 5: Solve for x
    x = 2,202,158,636.56/70,690.62
  6. Step 6: Final answer
    x = 31,152.06

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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.