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Finding the Fourth Proportional to 57,769.80, 86,581.80 and 28,123.80

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Solution

The fourth proportional to 57,769.80, 86,581.80 and 28,123.80 is: 42,150.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,769.80 : 86,581.80 = 28,123.80 : x
  2. Step 2: Convert to fraction form
    57,769.80/86,581.80 = 28,123.80/x
  3. Step 3: Cross multiply
    57,769.80x = 86,581.80 × 28,123.80
  4. Step 4: Simplify right side
    57,769.80x = 2,435,009,226.84
  5. Step 5: Solve for x
    x = 2,435,009,226.84/57,769.80
  6. Step 6: Final answer
    x = 42,150.21

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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.