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Finding the Fourth Proportional to 161,442.90, 242,161.90 and 72,633.68

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Solution

The fourth proportional to 161,442.90, 242,161.90 and 72,633.68 is: 108,949.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,442.90 : 242,161.90 = 72,633.68 : x
  2. Step 2: Convert to fraction form
    161,442.90/242,161.90 = 72,633.68/x
  3. Step 3: Cross multiply
    161,442.90x = 242,161.90 × 72,633.68
  4. Step 4: Simplify right side
    161,442.90x = 17,589,109,952.79
  5. Step 5: Solve for x
    x = 17,589,109,952.79/161,442.90
  6. Step 6: Final answer
    x = 108,949.42

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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.