Home / 81,137.68-111,966-45,320.56

Finding the Fourth Proportional to 81,137.68, 111,966 and 45,320.56

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Solution

The fourth proportional to 81,137.68, 111,966 and 45,320.56 is: 62,540.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,137.68 : 111,966 = 45,320.56 : x
  2. Step 2: Convert to fraction form
    81,137.68/111,966 = 45,320.56/x
  3. Step 3: Cross multiply
    81,137.68x = 111,966 × 45,320.56
  4. Step 4: Simplify right side
    81,137.68x = 5,074,361,820.96
  5. Step 5: Solve for x
    x = 5,074,361,820.96/81,137.68
  6. Step 6: Final answer
    x = 62,540.14

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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.