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Finding the Fourth Proportional to 68,668.64, 103,022.40 and 40,613.60

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Solution

The fourth proportional to 68,668.64, 103,022.40 and 40,613.60 is: 60,931.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,668.64 : 103,022.40 = 40,613.60 : x
  2. Step 2: Convert to fraction form
    68,668.64/103,022.40 = 40,613.60/x
  3. Step 3: Cross multiply
    68,668.64x = 103,022.40 × 40,613.60
  4. Step 4: Simplify right side
    68,668.64x = 4,184,110,544.64
  5. Step 5: Solve for x
    x = 4,184,110,544.64/68,668.64
  6. Step 6: Final answer
    x = 60,931.90

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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.