Home / 81,091.96-111,959.56-72,579.32

Finding the Fourth Proportional to 81,091.96, 111,959.56 and 72,579.32

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Solution

The fourth proportional to 81,091.96, 111,959.56 and 72,579.32 is: 100,206.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,091.96 : 111,959.56 = 72,579.32 : x
  2. Step 2: Convert to fraction form
    81,091.96/111,959.56 = 72,579.32/x
  3. Step 3: Cross multiply
    81,091.96x = 111,959.56 × 72,579.32
  4. Step 4: Simplify right side
    81,091.96x = 8,125,948,732.30
  5. Step 5: Solve for x
    x = 8,125,948,732.30/81,091.96
  6. Step 6: Final answer
    x = 100,206.59

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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.