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Finding the Fourth Proportional to 64,620.80, 89,170.56 and 37,769.60

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Solution

The fourth proportional to 64,620.80, 89,170.56 and 37,769.60 is: 52,118.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,620.80 : 89,170.56 = 37,769.60 : x
  2. Step 2: Convert to fraction form
    64,620.80/89,170.56 = 37,769.60/x
  3. Step 3: Cross multiply
    64,620.80x = 89,170.56 × 37,769.60
  4. Step 4: Simplify right side
    64,620.80x = 3,367,936,382.98
  5. Step 5: Solve for x
    x = 3,367,936,382.98/64,620.80
  6. Step 6: Final answer
    x = 52,118.46

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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.