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Finding the Fourth Proportional to 89,742.96, 134,658.90 and 65,991.96

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Solution

The fourth proportional to 89,742.96, 134,658.90 and 65,991.96 is: 99,020.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,742.96 : 134,658.90 = 65,991.96 : x
  2. Step 2: Convert to fraction form
    89,742.96/134,658.90 = 65,991.96/x
  3. Step 3: Cross multiply
    89,742.96x = 134,658.90 × 65,991.96
  4. Step 4: Simplify right side
    89,742.96x = 8,886,404,742.44
  5. Step 5: Solve for x
    x = 8,886,404,742.44/89,742.96
  6. Step 6: Final answer
    x = 99,020.63

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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.