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Finding the Fourth Proportional to 64,679.92, 89,257.44 and 36,385.60

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Solution

The fourth proportional to 64,679.92, 89,257.44 and 36,385.60 is: 50,211.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,679.92 : 89,257.44 = 36,385.60 : x
  2. Step 2: Convert to fraction form
    64,679.92/89,257.44 = 36,385.60/x
  3. Step 3: Cross multiply
    64,679.92x = 89,257.44 × 36,385.60
  4. Step 4: Simplify right side
    64,679.92x = 3,247,685,508.86
  5. Step 5: Solve for x
    x = 3,247,685,508.86/64,679.92
  6. Step 6: Final answer
    x = 50,211.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.