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Finding the Fourth Proportional to 51,213.80, 76,820.70 and 43,340.60

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Solution

The fourth proportional to 51,213.80, 76,820.70 and 43,340.60 is: 65,010.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,213.80 : 76,820.70 = 43,340.60 : x
  2. Step 2: Convert to fraction form
    51,213.80/76,820.70 = 43,340.60/x
  3. Step 3: Cross multiply
    51,213.80x = 76,820.70 × 43,340.60
  4. Step 4: Simplify right side
    51,213.80x = 3,329,455,230.42
  5. Step 5: Solve for x
    x = 3,329,455,230.42/51,213.80
  6. Step 6: Final answer
    x = 65,010.90

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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.