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Finding the Fourth Proportional to 91,803.70, 137,511.15 and 81,954.10

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Solution

The fourth proportional to 91,803.70, 137,511.15 and 81,954.10 is: 122,757.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,803.70 : 137,511.15 = 81,954.10 : x
  2. Step 2: Convert to fraction form
    91,803.70/137,511.15 = 81,954.10/x
  3. Step 3: Cross multiply
    91,803.70x = 137,511.15 × 81,954.10
  4. Step 4: Simplify right side
    91,803.70x = 11,269,602,538.22
  5. Step 5: Solve for x
    x = 11,269,602,538.22/91,803.70
  6. Step 6: Final answer
    x = 122,757.61

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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.