Home / 72,029.36-99,405.54-40,198.78

Finding the Fourth Proportional to 72,029.36, 99,405.54 and 40,198.78

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Solution

The fourth proportional to 72,029.36, 99,405.54 and 40,198.78 is: 55,477.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,029.36 : 99,405.54 = 40,198.78 : x
  2. Step 2: Convert to fraction form
    72,029.36/99,405.54 = 40,198.78/x
  3. Step 3: Cross multiply
    72,029.36x = 99,405.54 × 40,198.78
  4. Step 4: Simplify right side
    72,029.36x = 3,995,981,433.24
  5. Step 5: Solve for x
    x = 3,995,981,433.24/72,029.36
  6. Step 6: Final answer
    x = 55,477.12

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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.