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Finding the Fourth Proportional to 89,338.57, 134,007.72 and 69,631.90

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Solution

The fourth proportional to 89,338.57, 134,007.72 and 69,631.90 is: 104,447.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,338.57 : 134,007.72 = 69,631.90 : x
  2. Step 2: Convert to fraction form
    89,338.57/134,007.72 = 69,631.90/x
  3. Step 3: Cross multiply
    89,338.57x = 134,007.72 × 69,631.90
  4. Step 4: Simplify right side
    89,338.57x = 9,331,212,158.27
  5. Step 5: Solve for x
    x = 9,331,212,158.27/89,338.57
  6. Step 6: Final answer
    x = 104,447.74

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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.