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Finding the Fourth Proportional to 69,008.76, 103,508.15 and 18,403.88

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Solution

The fourth proportional to 69,008.76, 103,508.15 and 18,403.88 is: 27,604.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,008.76 : 103,508.15 = 18,403.88 : x
  2. Step 2: Convert to fraction form
    69,008.76/103,508.15 = 18,403.88/x
  3. Step 3: Cross multiply
    69,008.76x = 103,508.15 × 18,403.88
  4. Step 4: Simplify right side
    69,008.76x = 1,904,950,962.06
  5. Step 5: Solve for x
    x = 1,904,950,962.06/69,008.76
  6. Step 6: Final answer
    x = 27,604.48

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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.