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Finding the Fourth Proportional to 72,008.80, 108,013.20 and 49,847.20

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Solution

The fourth proportional to 72,008.80, 108,013.20 and 49,847.20 is: 74,770.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,008.80 : 108,013.20 = 49,847.20 : x
  2. Step 2: Convert to fraction form
    72,008.80/108,013.20 = 49,847.20/x
  3. Step 3: Cross multiply
    72,008.80x = 108,013.20 × 49,847.20
  4. Step 4: Simplify right side
    72,008.80x = 5,384,155,583.04
  5. Step 5: Solve for x
    x = 5,384,155,583.04/72,008.80
  6. Step 6: Final answer
    x = 74,770.80

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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.