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Finding the Fourth Proportional to 57,247.56, 78,918.03 and 40,200.30

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Solution

The fourth proportional to 57,247.56, 78,918.03 and 40,200.30 is: 55,417.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,247.56 : 78,918.03 = 40,200.30 : x
  2. Step 2: Convert to fraction form
    57,247.56/78,918.03 = 40,200.30/x
  3. Step 3: Cross multiply
    57,247.56x = 78,918.03 × 40,200.30
  4. Step 4: Simplify right side
    57,247.56x = 3,172,528,481.41
  5. Step 5: Solve for x
    x = 3,172,528,481.41/57,247.56
  6. Step 6: Final answer
    x = 55,417.71

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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.