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Finding the Fourth Proportional to 63,105.76, 87,087.02 and 40,788.64

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Solution

The fourth proportional to 63,105.76, 87,087.02 and 40,788.64 is: 56,289.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,105.76 : 87,087.02 = 40,788.64 : x
  2. Step 2: Convert to fraction form
    63,105.76/87,087.02 = 40,788.64/x
  3. Step 3: Cross multiply
    63,105.76x = 87,087.02 × 40,788.64
  4. Step 4: Simplify right side
    63,105.76x = 3,552,161,107.45
  5. Step 5: Solve for x
    x = 3,552,161,107.45/63,105.76
  6. Step 6: Final answer
    x = 56,289.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.