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Finding the Fourth Proportional to 64,647.89, 89,213.50 and 36,353.78

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Solution

The fourth proportional to 64,647.89, 89,213.50 and 36,353.78 is: 50,167.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,647.89 : 89,213.50 = 36,353.78 : x
  2. Step 2: Convert to fraction form
    64,647.89/89,213.50 = 36,353.78/x
  3. Step 3: Cross multiply
    64,647.89x = 89,213.50 × 36,353.78
  4. Step 4: Simplify right side
    64,647.89x = 3,243,247,952.03
  5. Step 5: Solve for x
    x = 3,243,247,952.03/64,647.89
  6. Step 6: Final answer
    x = 50,167.89

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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.