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Finding the Fourth Proportional to 223,625.50, 308,608.80 and 121,656.70

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Solution

The fourth proportional to 223,625.50, 308,608.80 and 121,656.70 is: 167,889.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,625.50 : 308,608.80 = 121,656.70 : x
  2. Step 2: Convert to fraction form
    223,625.50/308,608.80 = 121,656.70/x
  3. Step 3: Cross multiply
    223,625.50x = 308,608.80 × 121,656.70
  4. Step 4: Simplify right side
    223,625.50x = 37,544,328,198.96
  5. Step 5: Solve for x
    x = 37,544,328,198.96/223,625.50
  6. Step 6: Final answer
    x = 167,889.30

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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.