Home / 81,087.08-111,977.46-76,669.40

Finding the Fourth Proportional to 81,087.08, 111,977.46 and 76,669.40

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Solution

The fourth proportional to 81,087.08, 111,977.46 and 76,669.40 is: 105,876.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,087.08 : 111,977.46 = 76,669.40 : x
  2. Step 2: Convert to fraction form
    81,087.08/111,977.46 = 76,669.40/x
  3. Step 3: Cross multiply
    81,087.08x = 111,977.46 × 76,669.40
  4. Step 4: Simplify right side
    81,087.08x = 8,585,244,671.72
  5. Step 5: Solve for x
    x = 8,585,244,671.72/81,087.08
  6. Step 6: Final answer
    x = 105,876.85

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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.