Home / 91,081.53-135,716.85-81,144.45

Finding the Fourth Proportional to 91,081.53, 135,716.85 and 81,144.45

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Solution

The fourth proportional to 91,081.53, 135,716.85 and 81,144.45 is: 120,910.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,081.53 : 135,716.85 = 81,144.45 : x
  2. Step 2: Convert to fraction form
    91,081.53/135,716.85 = 81,144.45/x
  3. Step 3: Cross multiply
    91,081.53x = 135,716.85 × 81,144.45
  4. Step 4: Simplify right side
    91,081.53x = 11,012,669,148.98
  5. Step 5: Solve for x
    x = 11,012,669,148.98/91,081.53
  6. Step 6: Final answer
    x = 120,910.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.