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Finding the Fourth Proportional to 81,685.58, 112,738.30 and 49,872.92

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Solution

The fourth proportional to 81,685.58, 112,738.30 and 49,872.92 is: 68,832.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,685.58 : 112,738.30 = 49,872.92 : x
  2. Step 2: Convert to fraction form
    81,685.58/112,738.30 = 49,872.92/x
  3. Step 3: Cross multiply
    81,685.58x = 112,738.30 × 49,872.92
  4. Step 4: Simplify right side
    81,685.58x = 5,622,588,216.84
  5. Step 5: Solve for x
    x = 5,622,588,216.84/81,685.58
  6. Step 6: Final answer
    x = 68,832.08

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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.