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Finding the Fourth Proportional to 209,958.68, 289,788.13 and 123,885.65

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Solution

The fourth proportional to 209,958.68, 289,788.13 and 123,885.65 is: 170,988.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,958.68 : 289,788.13 = 123,885.65 : x
  2. Step 2: Convert to fraction form
    209,958.68/289,788.13 = 123,885.65/x
  3. Step 3: Cross multiply
    209,958.68x = 289,788.13 × 123,885.65
  4. Step 4: Simplify right side
    209,958.68x = 35,900,591,726.66
  5. Step 5: Solve for x
    x = 35,900,591,726.66/209,958.68
  6. Step 6: Final answer
    x = 170,988.84

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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.