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Finding the Fourth Proportional to 74,511.75, 102,826.90 and 40,520.56

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Solution

The fourth proportional to 74,511.75, 102,826.90 and 40,520.56 is: 55,918.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,511.75 : 102,826.90 = 40,520.56 : x
  2. Step 2: Convert to fraction form
    74,511.75/102,826.90 = 40,520.56/x
  3. Step 3: Cross multiply
    74,511.75x = 102,826.90 × 40,520.56
  4. Step 4: Simplify right side
    74,511.75x = 4,166,603,154.28
  5. Step 5: Solve for x
    x = 4,166,603,154.28/74,511.75
  6. Step 6: Final answer
    x = 55,918.74

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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.