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Finding the Fourth Proportional to 223,720.65, 308,728.35 and 121,743.81

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Solution

The fourth proportional to 223,720.65, 308,728.35 and 121,743.81 is: 168,003.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,720.65 : 308,728.35 = 121,743.81 : x
  2. Step 2: Convert to fraction form
    223,720.65/308,728.35 = 121,743.81/x
  3. Step 3: Cross multiply
    223,720.65x = 308,728.35 × 121,743.81
  4. Step 4: Simplify right side
    223,720.65x = 37,585,765,584.01
  5. Step 5: Solve for x
    x = 37,585,765,584.01/223,720.65
  6. Step 6: Final answer
    x = 168,003.11

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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.