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Finding the Fourth Proportional to 81,068.96, 121,631.38 and 33,709.48

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Solution

The fourth proportional to 81,068.96, 121,631.38 and 33,709.48 is: 50,575.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,068.96 : 121,631.38 = 33,709.48 : x
  2. Step 2: Convert to fraction form
    81,068.96/121,631.38 = 33,709.48/x
  3. Step 3: Cross multiply
    81,068.96x = 121,631.38 × 33,709.48
  4. Step 4: Simplify right side
    81,068.96x = 4,100,130,571.48
  5. Step 5: Solve for x
    x = 4,100,130,571.48/81,068.96
  6. Step 6: Final answer
    x = 50,575.84

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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.