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Finding the Fourth Proportional to 73,270.20, 109,905.30 and 28,872.78

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Solution

The fourth proportional to 73,270.20, 109,905.30 and 28,872.78 is: 43,309.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,270.20 : 109,905.30 = 28,872.78 : x
  2. Step 2: Convert to fraction form
    73,270.20/109,905.30 = 28,872.78/x
  3. Step 3: Cross multiply
    73,270.20x = 109,905.30 × 28,872.78
  4. Step 4: Simplify right side
    73,270.20x = 3,173,271,547.73
  5. Step 5: Solve for x
    x = 3,173,271,547.73/73,270.20
  6. Step 6: Final answer
    x = 43,309.17

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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.