Home / 70,657.16-105,986.34-20,738.07

Finding the Fourth Proportional to 70,657.16, 105,986.34 and 20,738.07

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Solution

The fourth proportional to 70,657.16, 105,986.34 and 20,738.07 is: 31,107.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,657.16 : 105,986.34 = 20,738.07 : x
  2. Step 2: Convert to fraction form
    70,657.16/105,986.34 = 20,738.07/x
  3. Step 3: Cross multiply
    70,657.16x = 105,986.34 × 20,738.07
  4. Step 4: Simplify right side
    70,657.16x = 2,197,952,137.96
  5. Step 5: Solve for x
    x = 2,197,952,137.96/70,657.16
  6. Step 6: Final answer
    x = 31,107.28

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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.