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Finding the Fourth Proportional to 90,424.80, 135,669.96 and 54,958.68

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Solution

The fourth proportional to 90,424.80, 135,669.96 and 54,958.68 is: 82,457.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,424.80 : 135,669.96 = 54,958.68 : x
  2. Step 2: Convert to fraction form
    90,424.80/135,669.96 = 54,958.68/x
  3. Step 3: Cross multiply
    90,424.80x = 135,669.96 × 54,958.68
  4. Step 4: Simplify right side
    90,424.80x = 7,456,241,917.25
  5. Step 5: Solve for x
    x = 7,456,241,917.25/90,424.80
  6. Step 6: Final answer
    x = 82,457.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.