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Finding the Fourth Proportional to 223,708.18, 308,722.98 and 121,739.18

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Solution

The fourth proportional to 223,708.18, 308,722.98 and 121,739.18 is: 168,003.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,708.18 : 308,722.98 = 121,739.18 : x
  2. Step 2: Convert to fraction form
    223,708.18/308,722.98 = 121,739.18/x
  3. Step 3: Cross multiply
    223,708.18x = 308,722.98 × 121,739.18
  4. Step 4: Simplify right side
    223,708.18x = 37,583,682,432.36
  5. Step 5: Solve for x
    x = 37,583,682,432.36/223,708.18
  6. Step 6: Final answer
    x = 168,003.17

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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.