Home / 81,145.36-121,519.26-67,018.96

Finding the Fourth Proportional to 81,145.36, 121,519.26 and 67,018.96

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Solution

The fourth proportional to 81,145.36, 121,519.26 and 67,018.96 is: 100,364.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,145.36 : 121,519.26 = 67,018.96 : x
  2. Step 2: Convert to fraction form
    81,145.36/121,519.26 = 67,018.96/x
  3. Step 3: Cross multiply
    81,145.36x = 121,519.26 × 67,018.96
  4. Step 4: Simplify right side
    81,145.36x = 8,144,094,425.17
  5. Step 5: Solve for x
    x = 8,144,094,425.17/81,145.36
  6. Step 6: Final answer
    x = 100,364.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.