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Finding the Fourth Proportional to 75,325.92, 103,977.72 and 64,672.80

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Solution

The fourth proportional to 75,325.92, 103,977.72 and 64,672.80 is: 89,272.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,325.92 : 103,977.72 = 64,672.80 : x
  2. Step 2: Convert to fraction form
    75,325.92/103,977.72 = 64,672.80/x
  3. Step 3: Cross multiply
    75,325.92x = 103,977.72 × 64,672.80
  4. Step 4: Simplify right side
    75,325.92x = 6,724,530,290.02
  5. Step 5: Solve for x
    x = 6,724,530,290.02/75,325.92
  6. Step 6: Final answer
    x = 89,272.46

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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.