Home / 81,919.20-112,977.84-63,986.40

Finding the Fourth Proportional to 81,919.20, 112,977.84 and 63,986.40

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Solution

The fourth proportional to 81,919.20, 112,977.84 and 63,986.40 is: 88,246.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,919.20 : 112,977.84 = 63,986.40 : x
  2. Step 2: Convert to fraction form
    81,919.20/112,977.84 = 63,986.40/x
  3. Step 3: Cross multiply
    81,919.20x = 112,977.84 × 63,986.40
  4. Step 4: Simplify right side
    81,919.20x = 7,229,045,261.38
  5. Step 5: Solve for x
    x = 7,229,045,261.38/81,919.20
  6. Step 6: Final answer
    x = 88,246.04

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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.