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Finding the Fourth Proportional to 52,991.28, 79,313.85 and 38,947.59

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Solution

The fourth proportional to 52,991.28, 79,313.85 and 38,947.59 is: 58,294.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,991.28 : 79,313.85 = 38,947.59 : x
  2. Step 2: Convert to fraction form
    52,991.28/79,313.85 = 38,947.59/x
  3. Step 3: Cross multiply
    52,991.28x = 79,313.85 × 38,947.59
  4. Step 4: Simplify right side
    52,991.28x = 3,089,083,311.12
  5. Step 5: Solve for x
    x = 3,089,083,311.12/52,991.28
  6. Step 6: Final answer
    x = 58,294.18

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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.