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Finding the Fourth Proportional to 66,743.40, 100,115.10 and 40,499.40

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Solution

The fourth proportional to 66,743.40, 100,115.10 and 40,499.40 is: 60,749.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,743.40 : 100,115.10 = 40,499.40 : x
  2. Step 2: Convert to fraction form
    66,743.40/100,115.10 = 40,499.40/x
  3. Step 3: Cross multiply
    66,743.40x = 100,115.10 × 40,499.40
  4. Step 4: Simplify right side
    66,743.40x = 4,054,601,480.94
  5. Step 5: Solve for x
    x = 4,054,601,480.94/66,743.40
  6. Step 6: Final answer
    x = 60,749.10

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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.