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Finding the Fourth Proportional to 81,776.70, 122,665.04 and 26,372.70

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Solution

The fourth proportional to 81,776.70, 122,665.04 and 26,372.70 is: 39,559.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,776.70 : 122,665.04 = 26,372.70 : x
  2. Step 2: Convert to fraction form
    81,776.70/122,665.04 = 26,372.70/x
  3. Step 3: Cross multiply
    81,776.70x = 122,665.04 × 26,372.70
  4. Step 4: Simplify right side
    81,776.70x = 3,235,008,300.41
  5. Step 5: Solve for x
    x = 3,235,008,300.41/81,776.70
  6. Step 6: Final answer
    x = 39,559.05

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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.