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Finding the Fourth Proportional to 209,286.90, 288,812.52 and 113,796

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Solution

The fourth proportional to 209,286.90, 288,812.52 and 113,796 is: 157,036.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,286.90 : 288,812.52 = 113,796 : x
  2. Step 2: Convert to fraction form
    209,286.90/288,812.52 = 113,796/x
  3. Step 3: Cross multiply
    209,286.90x = 288,812.52 × 113,796
  4. Step 4: Simplify right side
    209,286.90x = 32,865,709,525.92
  5. Step 5: Solve for x
    x = 32,865,709,525.92/209,286.90
  6. Step 6: Final answer
    x = 157,036.63

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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.