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Finding the Fourth Proportional to 70,718.94, 106,061.99 and 20,785.68

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Solution

The fourth proportional to 70,718.94, 106,061.99 and 20,785.68 is: 31,173.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,718.94 : 106,061.99 = 20,785.68 : x
  2. Step 2: Convert to fraction form
    70,718.94/106,061.99 = 20,785.68/x
  3. Step 3: Cross multiply
    70,718.94x = 106,061.99 × 20,785.68
  4. Step 4: Simplify right side
    70,718.94x = 2,204,570,480.37
  5. Step 5: Solve for x
    x = 2,204,570,480.37/70,718.94
  6. Step 6: Final answer
    x = 31,173.69

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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.