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Finding the Fourth Proportional to 57,003.80, 85,505.70 and 53,115.80

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Solution

The fourth proportional to 57,003.80, 85,505.70 and 53,115.80 is: 79,673.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,003.80 : 85,505.70 = 53,115.80 : x
  2. Step 2: Convert to fraction form
    57,003.80/85,505.70 = 53,115.80/x
  3. Step 3: Cross multiply
    57,003.80x = 85,505.70 × 53,115.80
  4. Step 4: Simplify right side
    57,003.80x = 4,541,703,660.06
  5. Step 5: Solve for x
    x = 4,541,703,660.06/57,003.80
  6. Step 6: Final answer
    x = 79,673.70

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1.5x scale

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.