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Finding the Fourth Proportional to 223,458.39, 308,378.66 and 121,490.71

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Solution

The fourth proportional to 223,458.39, 308,378.66 and 121,490.71 is: 167,660.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,458.39 : 308,378.66 = 121,490.71 : x
  2. Step 2: Convert to fraction form
    223,458.39/308,378.66 = 121,490.71/x
  3. Step 3: Cross multiply
    223,458.39x = 308,378.66 × 121,490.71
  4. Step 4: Simplify right side
    223,458.39x = 37,465,142,352.25
  5. Step 5: Solve for x
    x = 37,465,142,352.25/223,458.39
  6. Step 6: Final answer
    x = 167,660.49

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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.