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Finding the Fourth Proportional to 64,564.50, 89,103.87 and 39,418.86

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Solution

The fourth proportional to 64,564.50, 89,103.87 and 39,418.86 is: 54,400.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,564.50 : 89,103.87 = 39,418.86 : x
  2. Step 2: Convert to fraction form
    64,564.50/89,103.87 = 39,418.86/x
  3. Step 3: Cross multiply
    64,564.50x = 89,103.87 × 39,418.86
  4. Step 4: Simplify right side
    64,564.50x = 3,512,372,976.99
  5. Step 5: Solve for x
    x = 3,512,372,976.99/64,564.50
  6. Step 6: Final answer
    x = 54,400.99

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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.