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Finding the Fourth Proportional to 223,458.21, 308,378.41 and 121,490.53

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Solution

The fourth proportional to 223,458.21, 308,378.41 and 121,490.53 is: 167,660.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,458.21 : 308,378.41 = 121,490.53 : x
  2. Step 2: Convert to fraction form
    223,458.21/308,378.41 = 121,490.53/x
  3. Step 3: Cross multiply
    223,458.21x = 308,378.41 × 121,490.53
  4. Step 4: Simplify right side
    223,458.21x = 37,465,055,396.79
  5. Step 5: Solve for x
    x = 37,465,055,396.79/223,458.21
  6. Step 6: Final answer
    x = 167,660.23

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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.