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Finding the Fourth Proportional to 112,910.35, 155,805.06 and 65,179.08

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Solution

The fourth proportional to 112,910.35, 155,805.06 and 65,179.08 is: 89,940.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,910.35 : 155,805.06 = 65,179.08 : x
  2. Step 2: Convert to fraction form
    112,910.35/155,805.06 = 65,179.08/x
  3. Step 3: Cross multiply
    112,910.35x = 155,805.06 × 65,179.08
  4. Step 4: Simplify right side
    112,910.35x = 10,155,229,691.12
  5. Step 5: Solve for x
    x = 10,155,229,691.12/112,910.35
  6. Step 6: Final answer
    x = 89,940.64

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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.