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Finding the Fourth Proportional to 81,776.96, 122,678.40 and 26,360

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Solution

The fourth proportional to 81,776.96, 122,678.40 and 26,360 is: 39,544.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,776.96 : 122,678.40 = 26,360 : x
  2. Step 2: Convert to fraction form
    81,776.96/122,678.40 = 26,360/x
  3. Step 3: Cross multiply
    81,776.96x = 122,678.40 × 26,360
  4. Step 4: Simplify right side
    81,776.96x = 3,233,802,624
  5. Step 5: Solve for x
    x = 3,233,802,624/81,776.96
  6. Step 6: Final answer
    x = 39,544.18

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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.