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Finding the Fourth Proportional to 89,961.70, 134,856.15 and 69,960.10

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Solution

The fourth proportional to 89,961.70, 134,856.15 and 69,960.10 is: 104,872.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,961.70 : 134,856.15 = 69,960.10 : x
  2. Step 2: Convert to fraction form
    89,961.70/134,856.15 = 69,960.10/x
  3. Step 3: Cross multiply
    89,961.70x = 134,856.15 × 69,960.10
  4. Step 4: Simplify right side
    89,961.70x = 9,434,549,739.62
  5. Step 5: Solve for x
    x = 9,434,549,739.62/89,961.70
  6. Step 6: Final answer
    x = 104,872.96

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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.