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Finding the Fourth Proportional to 89,960.10, 134,940.15 and 88,647.90

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Solution

The fourth proportional to 89,960.10, 134,940.15 and 88,647.90 is: 132,971.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,960.10 : 134,940.15 = 88,647.90 : x
  2. Step 2: Convert to fraction form
    89,960.10/134,940.15 = 88,647.90/x
  3. Step 3: Cross multiply
    89,960.10x = 134,940.15 × 88,647.90
  4. Step 4: Simplify right side
    89,960.10x = 11,962,160,923.19
  5. Step 5: Solve for x
    x = 11,962,160,923.19/89,960.10
  6. Step 6: Final answer
    x = 132,971.85

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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.