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Finding the Fourth Proportional to 72,632.40, 108,954.88 and 20,041.89

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Solution

The fourth proportional to 72,632.40, 108,954.88 and 20,041.89 is: 30,064.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,632.40 : 108,954.88 = 20,041.89 : x
  2. Step 2: Convert to fraction form
    72,632.40/108,954.88 = 20,041.89/x
  3. Step 3: Cross multiply
    72,632.40x = 108,954.88 × 20,041.89
  4. Step 4: Simplify right side
    72,632.40x = 2,183,661,175.15
  5. Step 5: Solve for x
    x = 2,183,661,175.15/72,632.40
  6. Step 6: Final answer
    x = 30,064.56

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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.