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Finding the Fourth Proportional to 70,674.20, 106,015.32 and 20,069.28

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Solution

The fourth proportional to 70,674.20, 106,015.32 and 20,069.28 is: 30,105.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,674.20 : 106,015.32 = 20,069.28 : x
  2. Step 2: Convert to fraction form
    70,674.20/106,015.32 = 20,069.28/x
  3. Step 3: Cross multiply
    70,674.20x = 106,015.32 × 20,069.28
  4. Step 4: Simplify right side
    70,674.20x = 2,127,651,141.37
  5. Step 5: Solve for x
    x = 2,127,651,141.37/70,674.20
  6. Step 6: Final answer
    x = 30,105.06

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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.