Home / 82,181.52-113,213.70-78,179.40

Finding the Fourth Proportional to 82,181.52, 113,213.70 and 78,179.40

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Solution

The fourth proportional to 82,181.52, 113,213.70 and 78,179.40 is: 107,700.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,181.52 : 113,213.70 = 78,179.40 : x
  2. Step 2: Convert to fraction form
    82,181.52/113,213.70 = 78,179.40/x
  3. Step 3: Cross multiply
    82,181.52x = 113,213.70 × 78,179.40
  4. Step 4: Simplify right side
    82,181.52x = 8,850,979,137.78
  5. Step 5: Solve for x
    x = 8,850,979,137.78/82,181.52
  6. Step 6: Final answer
    x = 107,700.36

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1.5x scale

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.