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Finding the Fourth Proportional to 66,743.60, 100,115.40 and 40,499.60

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Solution

The fourth proportional to 66,743.60, 100,115.40 and 40,499.60 is: 60,749.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,743.60 : 100,115.40 = 40,499.60 : x
  2. Step 2: Convert to fraction form
    66,743.60/100,115.40 = 40,499.60/x
  3. Step 3: Cross multiply
    66,743.60x = 100,115.40 × 40,499.60
  4. Step 4: Simplify right side
    66,743.60x = 4,054,633,653.84
  5. Step 5: Solve for x
    x = 4,054,633,653.84/66,743.60
  6. Step 6: Final answer
    x = 60,749.40

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1.5x scale

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.