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Finding the Fourth Proportional to 81,160, 121,740.04 and 25,756

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Solution

The fourth proportional to 81,160, 121,740.04 and 25,756 is: 38,634.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,160 : 121,740.04 = 25,756 : x
  2. Step 2: Convert to fraction form
    81,160/121,740.04 = 25,756/x
  3. Step 3: Cross multiply
    81,160x = 121,740.04 × 25,756
  4. Step 4: Simplify right side
    81,160x = 3,135,536,470.24
  5. Step 5: Solve for x
    x = 3,135,536,470.24/81,160
  6. Step 6: Final answer
    x = 38,634.01

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.