Home / 45,399.60-68,121.36-20,457.36

Finding the Fourth Proportional to 45,399.60, 68,121.36 and 20,457.36

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Solution

The fourth proportional to 45,399.60, 68,121.36 and 20,457.36 is: 30,695.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,399.60 : 68,121.36 = 20,457.36 : x
  2. Step 2: Convert to fraction form
    45,399.60/68,121.36 = 20,457.36/x
  3. Step 3: Cross multiply
    45,399.60x = 68,121.36 × 20,457.36
  4. Step 4: Simplify right side
    45,399.60x = 1,393,583,185.21
  5. Step 5: Solve for x
    x = 1,393,583,185.21/45,399.60
  6. Step 6: Final answer
    x = 30,695.94

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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.