Home / 81,311.10-121,966.65-28,725.90

Finding the Fourth Proportional to 81,311.10, 121,966.65 and 28,725.90

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Solution

The fourth proportional to 81,311.10, 121,966.65 and 28,725.90 is: 43,088.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,311.10 : 121,966.65 = 28,725.90 : x
  2. Step 2: Convert to fraction form
    81,311.10/121,966.65 = 28,725.90/x
  3. Step 3: Cross multiply
    81,311.10x = 121,966.65 × 28,725.90
  4. Step 4: Simplify right side
    81,311.10x = 3,503,601,791.24
  5. Step 5: Solve for x
    x = 3,503,601,791.24/81,311.10
  6. Step 6: Final answer
    x = 43,088.85

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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.