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Finding the Fourth Proportional to 81,449.64, 112,400.36 and 49,618.54

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Solution

The fourth proportional to 81,449.64, 112,400.36 and 49,618.54 is: 68,473.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,449.64 : 112,400.36 = 49,618.54 : x
  2. Step 2: Convert to fraction form
    81,449.64/112,400.36 = 49,618.54/x
  3. Step 3: Cross multiply
    81,449.64x = 112,400.36 × 49,618.54
  4. Step 4: Simplify right side
    81,449.64x = 5,577,141,229.58
  5. Step 5: Solve for x
    x = 5,577,141,229.58/81,449.64
  6. Step 6: Final answer
    x = 68,473.49

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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.