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Finding the Fourth Proportional to 51,013.80, 76,520.70 and 40,516.20

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Solution

The fourth proportional to 51,013.80, 76,520.70 and 40,516.20 is: 60,774.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,013.80 : 76,520.70 = 40,516.20 : x
  2. Step 2: Convert to fraction form
    51,013.80/76,520.70 = 40,516.20/x
  3. Step 3: Cross multiply
    51,013.80x = 76,520.70 × 40,516.20
  4. Step 4: Simplify right side
    51,013.80x = 3,100,327,985.34
  5. Step 5: Solve for x
    x = 3,100,327,985.34/51,013.80
  6. Step 6: Final answer
    x = 60,774.30

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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.