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Finding the Fourth Proportional to 100,272.96, 138,375 and 59,963.81

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Solution

The fourth proportional to 100,272.96, 138,375 and 59,963.81 is: 82,749.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,272.96 : 138,375 = 59,963.81 : x
  2. Step 2: Convert to fraction form
    100,272.96/138,375 = 59,963.81/x
  3. Step 3: Cross multiply
    100,272.96x = 138,375 × 59,963.81
  4. Step 4: Simplify right side
    100,272.96x = 8,297,491,516.88
  5. Step 5: Solve for x
    x = 8,297,491,516.88/100,272.96
  6. Step 6: Final answer
    x = 82,749.04

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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.