Home / 68,415.10-94,428.60-40,129.90

Finding the Fourth Proportional to 68,415.10, 94,428.60 and 40,129.90

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Solution

The fourth proportional to 68,415.10, 94,428.60 and 40,129.90 is: 55,388.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,415.10 : 94,428.60 = 40,129.90 : x
  2. Step 2: Convert to fraction form
    68,415.10/94,428.60 = 40,129.90/x
  3. Step 3: Cross multiply
    68,415.10x = 94,428.60 × 40,129.90
  4. Step 4: Simplify right side
    68,415.10x = 3,789,410,275.14
  5. Step 5: Solve for x
    x = 3,789,410,275.14/68,415.10
  6. Step 6: Final answer
    x = 55,388.51

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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.