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Finding the Fourth Proportional to 76,310.80, 114,466.20 and 34,190.80

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Solution

The fourth proportional to 76,310.80, 114,466.20 and 34,190.80 is: 51,286.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,310.80 : 114,466.20 = 34,190.80 : x
  2. Step 2: Convert to fraction form
    76,310.80/114,466.20 = 34,190.80/x
  3. Step 3: Cross multiply
    76,310.80x = 114,466.20 × 34,190.80
  4. Step 4: Simplify right side
    76,310.80x = 3,913,690,950.96
  5. Step 5: Solve for x
    x = 3,913,690,950.96/76,310.80
  6. Step 6: Final answer
    x = 51,286.20

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1.5x scale

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.