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Finding the Fourth Proportional to 49,972.80, 74,911.20 and 28,891.20

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Solution

The fourth proportional to 49,972.80, 74,911.20 and 28,891.20 is: 43,309.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,972.80 : 74,911.20 = 28,891.20 : x
  2. Step 2: Convert to fraction form
    49,972.80/74,911.20 = 28,891.20/x
  3. Step 3: Cross multiply
    49,972.80x = 74,911.20 × 28,891.20
  4. Step 4: Simplify right side
    49,972.80x = 2,164,274,461.44
  5. Step 5: Solve for x
    x = 2,164,274,461.44/49,972.80
  6. Step 6: Final answer
    x = 43,309.05

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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.