Home / 81,519.91-112,401.44-75,474.07

Finding the Fourth Proportional to 81,519.91, 112,401.44 and 75,474.07

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Solution

The fourth proportional to 81,519.91, 112,401.44 and 75,474.07 is: 104,065.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,519.91 : 112,401.44 = 75,474.07 : x
  2. Step 2: Convert to fraction form
    81,519.91/112,401.44 = 75,474.07/x
  3. Step 3: Cross multiply
    81,519.91x = 112,401.44 × 75,474.07
  4. Step 4: Simplify right side
    81,519.91x = 8,483,393,775.31
  5. Step 5: Solve for x
    x = 8,483,393,775.31/81,519.91
  6. Step 6: Final answer
    x = 104,065.30

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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.