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Finding the Fourth Proportional to 71,318.60, 107,054.70 and 40,214.60

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Solution

The fourth proportional to 71,318.60, 107,054.70 and 40,214.60 is: 60,365.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,318.60 : 107,054.70 = 40,214.60 : x
  2. Step 2: Convert to fraction form
    71,318.60/107,054.70 = 40,214.60/x
  3. Step 3: Cross multiply
    71,318.60x = 107,054.70 × 40,214.60
  4. Step 4: Simplify right side
    71,318.60x = 4,305,161,938.62
  5. Step 5: Solve for x
    x = 4,305,161,938.62/71,318.60
  6. Step 6: Final answer
    x = 60,365.21

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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.