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Finding the Fourth Proportional to 261,194.79, 391,939.82 and 111,420.93

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Solution

The fourth proportional to 261,194.79, 391,939.82 and 111,420.93 is: 167,194.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,194.79 : 391,939.82 = 111,420.93 : x
  2. Step 2: Convert to fraction form
    261,194.79/391,939.82 = 111,420.93/x
  3. Step 3: Cross multiply
    261,194.79x = 391,939.82 × 111,420.93
  4. Step 4: Simplify right side
    261,194.79x = 43,670,298,691.33
  5. Step 5: Solve for x
    x = 43,670,298,691.33/261,194.79
  6. Step 6: Final answer
    x = 167,194.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.