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Finding the Fourth Proportional to 81,568.42, 112,499.49 and 67,396.66

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Solution

The fourth proportional to 81,568.42, 112,499.49 and 67,396.66 is: 92,953.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,568.42 : 112,499.49 = 67,396.66 : x
  2. Step 2: Convert to fraction form
    81,568.42/112,499.49 = 67,396.66/x
  3. Step 3: Cross multiply
    81,568.42x = 112,499.49 × 67,396.66
  4. Step 4: Simplify right side
    81,568.42x = 7,582,089,877.70
  5. Step 5: Solve for x
    x = 7,582,089,877.70/81,568.42
  6. Step 6: Final answer
    x = 92,953.74

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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.