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Finding the Fourth Proportional to 211,163.89, 316,712.83 and 69,008.04

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Solution

The fourth proportional to 211,163.89, 316,712.83 and 69,008.04 is: 103,501.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,163.89 : 316,712.83 = 69,008.04 : x
  2. Step 2: Convert to fraction form
    211,163.89/316,712.83 = 69,008.04/x
  3. Step 3: Cross multiply
    211,163.89x = 316,712.83 × 69,008.04
  4. Step 4: Simplify right side
    211,163.89x = 21,855,731,757.73
  5. Step 5: Solve for x
    x = 21,855,731,757.73/211,163.89
  6. Step 6: Final answer
    x = 103,501.27

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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.