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Finding the Fourth Proportional to 92,540.29, 138,599.68 and 72,424.30

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Solution

The fourth proportional to 92,540.29, 138,599.68 and 72,424.30 is: 108,471.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,540.29 : 138,599.68 = 72,424.30 : x
  2. Step 2: Convert to fraction form
    92,540.29/138,599.68 = 72,424.30/x
  3. Step 3: Cross multiply
    92,540.29x = 138,599.68 × 72,424.30
  4. Step 4: Simplify right side
    92,540.29x = 10,037,984,804.22
  5. Step 5: Solve for x
    x = 10,037,984,804.22/92,540.29
  6. Step 6: Final answer
    x = 108,471.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.