Home / 81,191.45-121,784.43-28,599.56

Finding the Fourth Proportional to 81,191.45, 121,784.43 and 28,599.56

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Solution

The fourth proportional to 81,191.45, 121,784.43 and 28,599.56 is: 42,898.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,191.45 : 121,784.43 = 28,599.56 : x
  2. Step 2: Convert to fraction form
    81,191.45/121,784.43 = 28,599.56/x
  3. Step 3: Cross multiply
    81,191.45x = 121,784.43 × 28,599.56
  4. Step 4: Simplify right side
    81,191.45x = 3,482,981,112.85
  5. Step 5: Solve for x
    x = 3,482,981,112.85/81,191.45
  6. Step 6: Final answer
    x = 42,898.37

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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.