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Finding the Fourth Proportional to 89,129.60, 133,694.40 and 64,246.40

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Solution

The fourth proportional to 89,129.60, 133,694.40 and 64,246.40 is: 96,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,129.60 : 133,694.40 = 64,246.40 : x
  2. Step 2: Convert to fraction form
    89,129.60/133,694.40 = 64,246.40/x
  3. Step 3: Cross multiply
    89,129.60x = 133,694.40 × 64,246.40
  4. Step 4: Simplify right side
    89,129.60x = 8,589,383,900.16
  5. Step 5: Solve for x
    x = 8,589,383,900.16/89,129.60
  6. Step 6: Final answer
    x = 96,369.60

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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.