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Finding the Fourth Proportional to 74,399.56, 102,672.12 and 40,865.56

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Solution

The fourth proportional to 74,399.56, 102,672.12 and 40,865.56 is: 56,394.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,399.56 : 102,672.12 = 40,865.56 : x
  2. Step 2: Convert to fraction form
    74,399.56/102,672.12 = 40,865.56/x
  3. Step 3: Cross multiply
    74,399.56x = 102,672.12 × 40,865.56
  4. Step 4: Simplify right side
    74,399.56x = 4,195,753,680.19
  5. Step 5: Solve for x
    x = 4,195,753,680.19/74,399.56
  6. Step 6: Final answer
    x = 56,394.87

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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.