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Finding the Fourth Proportional to 72,806.69, 109,210.08 and 20,216.18

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Solution

The fourth proportional to 72,806.69, 109,210.08 and 20,216.18 is: 30,324.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,806.69 : 109,210.08 = 20,216.18 : x
  2. Step 2: Convert to fraction form
    72,806.69/109,210.08 = 20,216.18/x
  3. Step 3: Cross multiply
    72,806.69x = 109,210.08 × 20,216.18
  4. Step 4: Simplify right side
    72,806.69x = 2,207,810,635.09
  5. Step 5: Solve for x
    x = 2,207,810,635.09/72,806.69
  6. Step 6: Final answer
    x = 30,324.28

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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.