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Finding the Fourth Proportional to 40,457.80, 60,698.66 and 20,750.20

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Solution

The fourth proportional to 40,457.80, 60,698.66 and 20,750.20 is: 31,131.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,457.80 : 60,698.66 = 20,750.20 : x
  2. Step 2: Convert to fraction form
    40,457.80/60,698.66 = 20,750.20/x
  3. Step 3: Cross multiply
    40,457.80x = 60,698.66 × 20,750.20
  4. Step 4: Simplify right side
    40,457.80x = 1,259,509,334.73
  5. Step 5: Solve for x
    x = 1,259,509,334.73/40,457.80
  6. Step 6: Final answer
    x = 31,131.43

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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.