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Finding the Fourth Proportional to 223,861.47, 308,918.49 and 121,886.62

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Solution

The fourth proportional to 223,861.47, 308,918.49 and 121,886.62 is: 168,197.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,861.47 : 308,918.49 = 121,886.62 : x
  2. Step 2: Convert to fraction form
    223,861.47/308,918.49 = 121,886.62/x
  3. Step 3: Cross multiply
    223,861.47x = 308,918.49 × 121,886.62
  4. Step 4: Simplify right side
    223,861.47x = 37,653,030,601.60
  5. Step 5: Solve for x
    x = 37,653,030,601.60/223,861.47
  6. Step 6: Final answer
    x = 168,197.91

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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.