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Finding the Fourth Proportional to 89,129.60, 133,694.40 and 71,633.60

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Solution

The fourth proportional to 89,129.60, 133,694.40 and 71,633.60 is: 107,450.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,129.60 : 133,694.40 = 71,633.60 : x
  2. Step 2: Convert to fraction form
    89,129.60/133,694.40 = 71,633.60/x
  3. Step 3: Cross multiply
    89,129.60x = 133,694.40 × 71,633.60
  4. Step 4: Simplify right side
    89,129.60x = 9,577,011,171.84
  5. Step 5: Solve for x
    x = 9,577,011,171.84/89,129.60
  6. Step 6: Final answer
    x = 107,450.40

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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.