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Finding the Fourth Proportional to 62,910, 94,344.84 and 20,780.28

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Solution

The fourth proportional to 62,910, 94,344.84 and 20,780.28 is: 31,163.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,910 : 94,344.84 = 20,780.28 : x
  2. Step 2: Convert to fraction form
    62,910/94,344.84 = 20,780.28/x
  3. Step 3: Cross multiply
    62,910x = 94,344.84 × 20,780.28
  4. Step 4: Simplify right side
    62,910x = 1,960,512,191.76
  5. Step 5: Solve for x
    x = 1,960,512,191.76/62,910
  6. Step 6: Final answer
    x = 31,163.76

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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.