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Finding the Fourth Proportional to 261,181.83, 391,772.75 and 74,169.03

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Solution

The fourth proportional to 261,181.83, 391,772.75 and 74,169.03 is: 111,253.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,181.83 : 391,772.75 = 74,169.03 : x
  2. Step 2: Convert to fraction form
    261,181.83/391,772.75 = 74,169.03/x
  3. Step 3: Cross multiply
    261,181.83x = 391,772.75 × 74,169.03
  4. Step 4: Simplify right side
    261,181.83x = 29,057,404,477.09
  5. Step 5: Solve for x
    x = 29,057,404,477.09/261,181.83
  6. Step 6: Final answer
    x = 111,253.55

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1.5x scale

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.