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Finding the Fourth Proportional to 72,828.84, 100,505.68 and 40,998.88

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Solution

The fourth proportional to 72,828.84, 100,505.68 and 40,998.88 is: 56,579.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,828.84 : 100,505.68 = 40,998.88 : x
  2. Step 2: Convert to fraction form
    72,828.84/100,505.68 = 40,998.88/x
  3. Step 3: Cross multiply
    72,828.84x = 100,505.68 × 40,998.88
  4. Step 4: Simplify right side
    72,828.84x = 4,120,620,313.64
  5. Step 5: Solve for x
    x = 4,120,620,313.64/72,828.84
  6. Step 6: Final answer
    x = 56,579.51

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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.