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Finding the Fourth Proportional to 73,287.80, 109,910.10 and 28,899.80

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Solution

The fourth proportional to 73,287.80, 109,910.10 and 28,899.80 is: 43,341.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,287.80 : 109,910.10 = 28,899.80 : x
  2. Step 2: Convert to fraction form
    73,287.80/109,910.10 = 28,899.80/x
  3. Step 3: Cross multiply
    73,287.80x = 109,910.10 × 28,899.80
  4. Step 4: Simplify right side
    73,287.80x = 3,176,379,907.98
  5. Step 5: Solve for x
    x = 3,176,379,907.98/73,287.80
  6. Step 6: Final answer
    x = 43,341.18

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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.