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Finding the Fourth Proportional to 72,078.51, 108,128.10 and 22,162.80

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Solution

The fourth proportional to 72,078.51, 108,128.10 and 22,162.80 is: 33,247.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,078.51 : 108,128.10 = 22,162.80 : x
  2. Step 2: Convert to fraction form
    72,078.51/108,128.10 = 22,162.80/x
  3. Step 3: Cross multiply
    72,078.51x = 108,128.10 × 22,162.80
  4. Step 4: Simplify right side
    72,078.51x = 2,396,421,454.68
  5. Step 5: Solve for x
    x = 2,396,421,454.68/72,078.51
  6. Step 6: Final answer
    x = 33,247.38

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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.