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Finding the Fourth Proportional to 89,161.88, 123,056 and 55,181.32

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Solution

The fourth proportional to 89,161.88, 123,056 and 55,181.32 is: 76,158.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,161.88 : 123,056 = 55,181.32 : x
  2. Step 2: Convert to fraction form
    89,161.88/123,056 = 55,181.32/x
  3. Step 3: Cross multiply
    89,161.88x = 123,056 × 55,181.32
  4. Step 4: Simplify right side
    89,161.88x = 6,790,392,513.92
  5. Step 5: Solve for x
    x = 6,790,392,513.92/89,161.88
  6. Step 6: Final answer
    x = 76,158.02

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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.