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Finding the Fourth Proportional to 49,331.60, 74,076.60 and 45,693.20

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Solution

The fourth proportional to 49,331.60, 74,076.60 and 45,693.20 is: 68,613.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,331.60 : 74,076.60 = 45,693.20 : x
  2. Step 2: Convert to fraction form
    49,331.60/74,076.60 = 45,693.20/x
  3. Step 3: Cross multiply
    49,331.60x = 74,076.60 × 45,693.20
  4. Step 4: Simplify right side
    49,331.60x = 3,384,796,899.12
  5. Step 5: Solve for x
    x = 3,384,796,899.12/49,331.60
  6. Step 6: Final answer
    x = 68,613.16

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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.