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Finding the Fourth Proportional to 91,889.40, 137,834.10 and 84,516.60

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Solution

The fourth proportional to 91,889.40, 137,834.10 and 84,516.60 is: 126,774.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,889.40 : 137,834.10 = 84,516.60 : x
  2. Step 2: Convert to fraction form
    91,889.40/137,834.10 = 84,516.60/x
  3. Step 3: Cross multiply
    91,889.40x = 137,834.10 × 84,516.60
  4. Step 4: Simplify right side
    91,889.40x = 11,649,269,496.06
  5. Step 5: Solve for x
    x = 11,649,269,496.06/91,889.40
  6. Step 6: Final answer
    x = 126,774.90

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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.