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Finding the Fourth Proportional to 223,917.15, 308,991.65 and 123,315.15

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Solution

The fourth proportional to 223,917.15, 308,991.65 and 123,315.15 is: 170,167.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,917.15 : 308,991.65 = 123,315.15 : x
  2. Step 2: Convert to fraction form
    223,917.15/308,991.65 = 123,315.15/x
  3. Step 3: Cross multiply
    223,917.15x = 308,991.65 × 123,315.15
  4. Step 4: Simplify right side
    223,917.15x = 38,103,351,668.50
  5. Step 5: Solve for x
    x = 38,103,351,668.50/223,917.15
  6. Step 6: Final answer
    x = 170,167.19

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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.