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Finding the Fourth Proportional to 75,163.76, 103,630.41 and 53,679.21

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Solution

The fourth proportional to 75,163.76, 103,630.41 and 53,679.21 is: 74,009.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,163.76 : 103,630.41 = 53,679.21 : x
  2. Step 2: Convert to fraction form
    75,163.76/103,630.41 = 53,679.21/x
  3. Step 3: Cross multiply
    75,163.76x = 103,630.41 × 53,679.21
  4. Step 4: Simplify right side
    75,163.76x = 5,562,798,540.78
  5. Step 5: Solve for x
    x = 5,562,798,540.78/75,163.76
  6. Step 6: Final answer
    x = 74,009.05

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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.