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Finding the Fourth Proportional to 72,761.37, 100,410.32 and 40,930.50

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Solution

The fourth proportional to 72,761.37, 100,410.32 and 40,930.50 is: 56,483.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,761.37 : 100,410.32 = 40,930.50 : x
  2. Step 2: Convert to fraction form
    72,761.37/100,410.32 = 40,930.50/x
  3. Step 3: Cross multiply
    72,761.37x = 100,410.32 × 40,930.50
  4. Step 4: Simplify right side
    72,761.37x = 4,109,844,398.11
  5. Step 5: Solve for x
    x = 4,109,844,398.11/72,761.37
  6. Step 6: Final answer
    x = 56,483.88

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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.