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Finding the Fourth Proportional to 81,160.84, 121,675.70 and 33,811.60

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Solution

The fourth proportional to 81,160.84, 121,675.70 and 33,811.60 is: 50,690.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,160.84 : 121,675.70 = 33,811.60 : x
  2. Step 2: Convert to fraction form
    81,160.84/121,675.70 = 33,811.60/x
  3. Step 3: Cross multiply
    81,160.84x = 121,675.70 × 33,811.60
  4. Step 4: Simplify right side
    81,160.84x = 4,114,050,098.12
  5. Step 5: Solve for x
    x = 4,114,050,098.12/81,160.84
  6. Step 6: Final answer
    x = 50,690.09

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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.