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Finding the Fourth Proportional to 81,243.36, 112,080.24 and 47,694.24

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Solution

The fourth proportional to 81,243.36, 112,080.24 and 47,694.24 is: 65,797.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,243.36 : 112,080.24 = 47,694.24 : x
  2. Step 2: Convert to fraction form
    81,243.36/112,080.24 = 47,694.24/x
  3. Step 3: Cross multiply
    81,243.36x = 112,080.24 × 47,694.24
  4. Step 4: Simplify right side
    81,243.36x = 5,345,581,865.82
  5. Step 5: Solve for x
    x = 5,345,581,865.82/81,243.36
  6. Step 6: Final answer
    x = 65,797.15

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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.