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Finding the Fourth Proportional to 71,310.60, 107,042.70 and 40,206.60

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Solution

The fourth proportional to 71,310.60, 107,042.70 and 40,206.60 is: 60,353.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,310.60 : 107,042.70 = 40,206.60 : x
  2. Step 2: Convert to fraction form
    71,310.60/107,042.70 = 40,206.60/x
  3. Step 3: Cross multiply
    71,310.60x = 107,042.70 × 40,206.60
  4. Step 4: Simplify right side
    71,310.60x = 4,303,823,021.82
  5. Step 5: Solve for x
    x = 4,303,823,021.82/71,310.60
  6. Step 6: Final answer
    x = 60,353.20

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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.