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Finding the Fourth Proportional to 76,834.80, 115,325.10 and 47,310.30

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Solution

The fourth proportional to 76,834.80, 115,325.10 and 47,310.30 is: 71,010.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,834.80 : 115,325.10 = 47,310.30 : x
  2. Step 2: Convert to fraction form
    76,834.80/115,325.10 = 47,310.30/x
  3. Step 3: Cross multiply
    76,834.80x = 115,325.10 × 47,310.30
  4. Step 4: Simplify right side
    76,834.80x = 5,456,065,078.53
  5. Step 5: Solve for x
    x = 5,456,065,078.53/76,834.80
  6. Step 6: Final answer
    x = 71,010.34

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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.