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Finding the Fourth Proportional to 81,418.76, 122,169.86 and 38,772.42

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Solution

The fourth proportional to 81,418.76, 122,169.86 and 38,772.42 is: 58,178.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,418.76 : 122,169.86 = 38,772.42 : x
  2. Step 2: Convert to fraction form
    81,418.76/122,169.86 = 38,772.42/x
  3. Step 3: Cross multiply
    81,418.76x = 122,169.86 × 38,772.42
  4. Step 4: Simplify right side
    81,418.76x = 4,736,820,929.40
  5. Step 5: Solve for x
    x = 4,736,820,929.40/81,418.76
  6. Step 6: Final answer
    x = 58,178.50

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