Home / 68,629.10-102,770.85-45,128.30

Finding the Fourth Proportional to 68,629.10, 102,770.85 and 45,128.30

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Solution

The fourth proportional to 68,629.10, 102,770.85 and 45,128.30 is: 67,578.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,629.10 : 102,770.85 = 45,128.30 : x
  2. Step 2: Convert to fraction form
    68,629.10/102,770.85 = 45,128.30/x
  3. Step 3: Cross multiply
    68,629.10x = 102,770.85 × 45,128.30
  4. Step 4: Simplify right side
    68,629.10x = 4,637,873,750.06
  5. Step 5: Solve for x
    x = 4,637,873,750.06/68,629.10
  6. Step 6: Final answer
    x = 67,578.82

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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.