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Finding the Fourth Proportional to 68,785.72, 103,178.58 and 55,022.20

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Solution

The fourth proportional to 68,785.72, 103,178.58 and 55,022.20 is: 82,533.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,785.72 : 103,178.58 = 55,022.20 : x
  2. Step 2: Convert to fraction form
    68,785.72/103,178.58 = 55,022.20/x
  3. Step 3: Cross multiply
    68,785.72x = 103,178.58 × 55,022.20
  4. Step 4: Simplify right side
    68,785.72x = 5,677,112,464.48
  5. Step 5: Solve for x
    x = 5,677,112,464.48/68,785.72
  6. Step 6: Final answer
    x = 82,533.30

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1.5x scale

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.