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Finding the Fourth Proportional to 87,189.44, 120,284.88 and 53,636

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Solution

The fourth proportional to 87,189.44, 120,284.88 and 53,636 is: 73,995.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,189.44 : 120,284.88 = 53,636 : x
  2. Step 2: Convert to fraction form
    87,189.44/120,284.88 = 53,636/x
  3. Step 3: Cross multiply
    87,189.44x = 120,284.88 × 53,636
  4. Step 4: Simplify right side
    87,189.44x = 6,451,599,823.68
  5. Step 5: Solve for x
    x = 6,451,599,823.68/87,189.44
  6. Step 6: Final answer
    x = 73,995.20

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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.