Home / 74,629.88-102,989.58-40,638.20

Finding the Fourth Proportional to 74,629.88, 102,989.58 and 40,638.20

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Solution

The fourth proportional to 74,629.88, 102,989.58 and 40,638.20 is: 56,080.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,629.88 : 102,989.58 = 40,638.20 : x
  2. Step 2: Convert to fraction form
    74,629.88/102,989.58 = 40,638.20/x
  3. Step 3: Cross multiply
    74,629.88x = 102,989.58 × 40,638.20
  4. Step 4: Simplify right side
    74,629.88x = 4,185,311,149.96
  5. Step 5: Solve for x
    x = 4,185,311,149.96/74,629.88
  6. Step 6: Final answer
    x = 56,080.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.