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Finding the Fourth Proportional to 223,644.05, 308,621.75 and 121,666.89

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Solution

The fourth proportional to 223,644.05, 308,621.75 and 121,666.89 is: 167,896.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,644.05 : 308,621.75 = 121,666.89 : x
  2. Step 2: Convert to fraction form
    223,644.05/308,621.75 = 121,666.89/x
  3. Step 3: Cross multiply
    223,644.05x = 308,621.75 × 121,666.89
  4. Step 4: Simplify right side
    223,644.05x = 37,549,047,900.52
  5. Step 5: Solve for x
    x = 37,549,047,900.52/223,644.05
  6. Step 6: Final answer
    x = 167,896.48

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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.