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Finding the Fourth Proportional to 89,769.60, 134,524.80 and 39,808.80

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Solution

The fourth proportional to 89,769.60, 134,524.80 and 39,808.80 is: 59,655.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,769.60 : 134,524.80 = 39,808.80 : x
  2. Step 2: Convert to fraction form
    89,769.60/134,524.80 = 39,808.80/x
  3. Step 3: Cross multiply
    89,769.60x = 134,524.80 × 39,808.80
  4. Step 4: Simplify right side
    89,769.60x = 5,355,270,858.24
  5. Step 5: Solve for x
    x = 5,355,270,858.24/89,769.60
  6. Step 6: Final answer
    x = 59,655.73

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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.