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Finding the Fourth Proportional to 79,511.99, 109,728.86 and 43,704.32

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Solution

The fourth proportional to 79,511.99, 109,728.86 and 43,704.32 is: 60,313.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,511.99 : 109,728.86 = 43,704.32 : x
  2. Step 2: Convert to fraction form
    79,511.99/109,728.86 = 43,704.32/x
  3. Step 3: Cross multiply
    79,511.99x = 109,728.86 × 43,704.32
  4. Step 4: Simplify right side
    79,511.99x = 4,795,625,210.68
  5. Step 5: Solve for x
    x = 4,795,625,210.68/79,511.99
  6. Step 6: Final answer
    x = 60,313.23

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1.5x scale

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.