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Finding the Fourth Proportional to 40,494.80, 60,742.20 and 30,126.80

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Solution

The fourth proportional to 40,494.80, 60,742.20 and 30,126.80 is: 45,190.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,494.80 : 60,742.20 = 30,126.80 : x
  2. Step 2: Convert to fraction form
    40,494.80/60,742.20 = 30,126.80/x
  3. Step 3: Cross multiply
    40,494.80x = 60,742.20 × 30,126.80
  4. Step 4: Simplify right side
    40,494.80x = 1,829,968,110.96
  5. Step 5: Solve for x
    x = 1,829,968,110.96/40,494.80
  6. Step 6: Final answer
    x = 45,190.20

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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.