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Finding the Fourth Proportional to 99,680.76, 137,559.44 and 54,968.76

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Solution

The fourth proportional to 99,680.76, 137,559.44 and 54,968.76 is: 75,856.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,680.76 : 137,559.44 = 54,968.76 : x
  2. Step 2: Convert to fraction form
    99,680.76/137,559.44 = 54,968.76/x
  3. Step 3: Cross multiply
    99,680.76x = 137,559.44 × 54,968.76
  4. Step 4: Simplify right side
    99,680.76x = 7,561,471,843.09
  5. Step 5: Solve for x
    x = 7,561,471,843.09/99,680.76
  6. Step 6: Final answer
    x = 75,856.88

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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.