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Finding the Fourth Proportional to 89,850.60, 134,775.90 and 81,102.60

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Solution

The fourth proportional to 89,850.60, 134,775.90 and 81,102.60 is: 121,653.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,850.60 : 134,775.90 = 81,102.60 : x
  2. Step 2: Convert to fraction form
    89,850.60/134,775.90 = 81,102.60/x
  3. Step 3: Cross multiply
    89,850.60x = 134,775.90 × 81,102.60
  4. Step 4: Simplify right side
    89,850.60x = 10,930,675,907.34
  5. Step 5: Solve for x
    x = 10,930,675,907.34/89,850.60
  6. Step 6: Final answer
    x = 121,653.90

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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.