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Finding the Fourth Proportional to 40,502.20, 60,704.70 and 20,770.60

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Solution

The fourth proportional to 40,502.20, 60,704.70 and 20,770.60 is: 31,130.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,502.20 : 60,704.70 = 20,770.60 : x
  2. Step 2: Convert to fraction form
    40,502.20/60,704.70 = 20,770.60/x
  3. Step 3: Cross multiply
    40,502.20x = 60,704.70 × 20,770.60
  4. Step 4: Simplify right side
    40,502.20x = 1,260,873,041.82
  5. Step 5: Solve for x
    x = 1,260,873,041.82/40,502.20
  6. Step 6: Final answer
    x = 31,130.98

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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.