Home / 105,811.20-158,716.80-82,455.12

Finding the Fourth Proportional to 105,811.20, 158,716.80 and 82,455.12

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Solution

The fourth proportional to 105,811.20, 158,716.80 and 82,455.12 is: 123,682.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,811.20 : 158,716.80 = 82,455.12 : x
  2. Step 2: Convert to fraction form
    105,811.20/158,716.80 = 82,455.12/x
  3. Step 3: Cross multiply
    105,811.20x = 158,716.80 × 82,455.12
  4. Step 4: Simplify right side
    105,811.20x = 13,087,012,790.02
  5. Step 5: Solve for x
    x = 13,087,012,790.02/105,811.20
  6. Step 6: Final answer
    x = 123,682.68

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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.