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Finding the Fourth Proportional to 73,172.40, 109,781.64 and 43,623.60

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Solution

The fourth proportional to 73,172.40, 109,781.64 and 43,623.60 is: 65,449.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,172.40 : 109,781.64 = 43,623.60 : x
  2. Step 2: Convert to fraction form
    73,172.40/109,781.64 = 43,623.60/x
  3. Step 3: Cross multiply
    73,172.40x = 109,781.64 × 43,623.60
  4. Step 4: Simplify right side
    73,172.40x = 4,789,070,350.70
  5. Step 5: Solve for x
    x = 4,789,070,350.70/73,172.40
  6. Step 6: Final answer
    x = 65,449.14

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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.