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Finding the Fourth Proportional to 72,645.16, 108,974.01 and 20,054.65

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Solution

The fourth proportional to 72,645.16, 108,974.01 and 20,054.65 is: 30,083.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,645.16 : 108,974.01 = 20,054.65 : x
  2. Step 2: Convert to fraction form
    72,645.16/108,974.01 = 20,054.65/x
  3. Step 3: Cross multiply
    72,645.16x = 108,974.01 × 20,054.65
  4. Step 4: Simplify right side
    72,645.16x = 2,185,435,629.65
  5. Step 5: Solve for x
    x = 2,185,435,629.65/72,645.16
  6. Step 6: Final answer
    x = 30,083.71

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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.