Home / 76,286.20-105,216.96-66,838.36

Finding the Fourth Proportional to 76,286.20, 105,216.96 and 66,838.36

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Solution

The fourth proportional to 76,286.20, 105,216.96 and 66,838.36 is: 92,186.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,286.20 : 105,216.96 = 66,838.36 : x
  2. Step 2: Convert to fraction form
    76,286.20/105,216.96 = 66,838.36/x
  3. Step 3: Cross multiply
    76,286.20x = 105,216.96 × 66,838.36
  4. Step 4: Simplify right side
    76,286.20x = 7,032,529,050.59
  5. Step 5: Solve for x
    x = 7,032,529,050.59/76,286.20
  6. Step 6: Final answer
    x = 92,186.12

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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.