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Finding the Fourth Proportional to 209,487.30, 289,092.54 and 113,991.94

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Solution

The fourth proportional to 209,487.30, 289,092.54 and 113,991.94 is: 157,308.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,487.30 : 289,092.54 = 113,991.94 : x
  2. Step 2: Convert to fraction form
    209,487.30/289,092.54 = 113,991.94/x
  3. Step 3: Cross multiply
    209,487.30x = 289,092.54 × 113,991.94
  4. Step 4: Simplify right side
    209,487.30x = 32,954,219,474.13
  5. Step 5: Solve for x
    x = 32,954,219,474.13/209,487.30
  6. Step 6: Final answer
    x = 157,308.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.