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Finding the Fourth Proportional to 107,866.98, 161,855.04 and 72,732.78

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Solution

The fourth proportional to 107,866.98, 161,855.04 and 72,732.78 is: 109,135.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,866.98 : 161,855.04 = 72,732.78 : x
  2. Step 2: Convert to fraction form
    107,866.98/161,855.04 = 72,732.78/x
  3. Step 3: Cross multiply
    107,866.98x = 161,855.04 × 72,732.78
  4. Step 4: Simplify right side
    107,866.98x = 11,772,167,016.21
  5. Step 5: Solve for x
    x = 11,772,167,016.21/107,866.98
  6. Step 6: Final answer
    x = 109,135.97

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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.