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Finding the Fourth Proportional to 223,645.05, 308,623.12 and 121,667.89

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Solution

The fourth proportional to 223,645.05, 308,623.12 and 121,667.89 is: 167,897.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,645.05 : 308,623.12 = 121,667.89 : x
  2. Step 2: Convert to fraction form
    223,645.05/308,623.12 = 121,667.89/x
  3. Step 3: Cross multiply
    223,645.05x = 308,623.12 × 121,667.89
  4. Step 4: Simplify right side
    223,645.05x = 37,549,523,815.62
  5. Step 5: Solve for x
    x = 37,549,523,815.62/223,645.05
  6. Step 6: Final answer
    x = 167,897.85

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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.