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Finding the Fourth Proportional to 81,102.68, 111,886.92 and 50,867.40

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Solution

The fourth proportional to 81,102.68, 111,886.92 and 50,867.40 is: 70,175.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,102.68 : 111,886.92 = 50,867.40 : x
  2. Step 2: Convert to fraction form
    81,102.68/111,886.92 = 50,867.40/x
  3. Step 3: Cross multiply
    81,102.68x = 111,886.92 × 50,867.40
  4. Step 4: Simplify right side
    81,102.68x = 5,691,396,714.41
  5. Step 5: Solve for x
    x = 5,691,396,714.41/81,102.68
  6. Step 6: Final answer
    x = 70,175.20

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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.