Home / 100,431.53-138,599.60-60,137.27

Finding the Fourth Proportional to 100,431.53, 138,599.60 and 60,137.27

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Solution

The fourth proportional to 100,431.53, 138,599.60 and 60,137.27 is: 82,991.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,431.53 : 138,599.60 = 60,137.27 : x
  2. Step 2: Convert to fraction form
    100,431.53/138,599.60 = 60,137.27/x
  3. Step 3: Cross multiply
    100,431.53x = 138,599.60 × 60,137.27
  4. Step 4: Simplify right side
    100,431.53x = 8,335,000,573.41
  5. Step 5: Solve for x
    x = 8,335,000,573.41/100,431.53
  6. Step 6: Final answer
    x = 82,991.88

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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.