Home / 81,811.68-113,101.32-81,063.24

Finding the Fourth Proportional to 81,811.68, 113,101.32 and 81,063.24

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Solution

The fourth proportional to 81,811.68, 113,101.32 and 81,063.24 is: 112,066.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,811.68 : 113,101.32 = 81,063.24 : x
  2. Step 2: Convert to fraction form
    81,811.68/113,101.32 = 81,063.24/x
  3. Step 3: Cross multiply
    81,811.68x = 113,101.32 × 81,063.24
  4. Step 4: Simplify right side
    81,811.68x = 9,168,359,447.48
  5. Step 5: Solve for x
    x = 9,168,359,447.48/81,811.68
  6. Step 6: Final answer
    x = 112,066.63

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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.