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Finding the Fourth Proportional to 223,640.91, 308,624.22 and 121,666.05

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Solution

The fourth proportional to 223,640.91, 308,624.22 and 121,666.05 is: 167,899.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,640.91 : 308,624.22 = 121,666.05 : x
  2. Step 2: Convert to fraction form
    223,640.91/308,624.22 = 121,666.05/x
  3. Step 3: Cross multiply
    223,640.91x = 308,624.22 × 121,666.05
  4. Step 4: Simplify right side
    223,640.91x = 37,549,089,781.73
  5. Step 5: Solve for x
    x = 37,549,089,781.73/223,640.91
  6. Step 6: Final answer
    x = 167,899.02

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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.