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Finding the Fourth Proportional to 73,279.20, 109,918.80 and 40,101.60

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Solution

The fourth proportional to 73,279.20, 109,918.80 and 40,101.60 is: 60,152.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,279.20 : 109,918.80 = 40,101.60 : x
  2. Step 2: Convert to fraction form
    73,279.20/109,918.80 = 40,101.60/x
  3. Step 3: Cross multiply
    73,279.20x = 109,918.80 × 40,101.60
  4. Step 4: Simplify right side
    73,279.20x = 4,407,919,750.08
  5. Step 5: Solve for x
    x = 4,407,919,750.08/73,279.20
  6. Step 6: Final answer
    x = 60,152.40

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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.