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Finding the Fourth Proportional to 91,147.95, 136,525.09 and 88,917.21

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Solution

The fourth proportional to 91,147.95, 136,525.09 and 88,917.21 is: 133,183.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,147.95 : 136,525.09 = 88,917.21 : x
  2. Step 2: Convert to fraction form
    91,147.95/136,525.09 = 88,917.21/x
  3. Step 3: Cross multiply
    91,147.95x = 136,525.09 × 88,917.21
  4. Step 4: Simplify right side
    91,147.95x = 12,139,429,474.68
  5. Step 5: Solve for x
    x = 12,139,429,474.68/91,147.95
  6. Step 6: Final answer
    x = 133,183.80

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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.