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Finding the Fourth Proportional to 260,940.86, 391,435.20 and 81,027.32

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Solution

The fourth proportional to 260,940.86, 391,435.20 and 81,027.32 is: 121,548.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,940.86 : 391,435.20 = 81,027.32 : x
  2. Step 2: Convert to fraction form
    260,940.86/391,435.20 = 81,027.32/x
  3. Step 3: Cross multiply
    260,940.86x = 391,435.20 × 81,027.32
  4. Step 4: Simplify right side
    260,940.86x = 31,716,945,209.66
  5. Step 5: Solve for x
    x = 31,716,945,209.66/260,940.86
  6. Step 6: Final answer
    x = 121,548.40

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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.