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Finding the Fourth Proportional to 223,859.72, 308,916.08 and 121,884.87

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Solution

The fourth proportional to 223,859.72, 308,916.08 and 121,884.87 is: 168,195.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,859.72 : 308,916.08 = 121,884.87 : x
  2. Step 2: Convert to fraction form
    223,859.72/308,916.08 = 121,884.87/x
  3. Step 3: Cross multiply
    223,859.72x = 308,916.08 × 121,884.87
  4. Step 4: Simplify right side
    223,859.72x = 37,652,195,520.14
  5. Step 5: Solve for x
    x = 37,652,195,520.14/223,859.72
  6. Step 6: Final answer
    x = 168,195.49

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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.