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Finding the Fourth Proportional to 81,607.94, 122,397.84 and 21,636.84

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Solution

The fourth proportional to 81,607.94, 122,397.84 and 21,636.84 is: 32,451.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,607.94 : 122,397.84 = 21,636.84 : x
  2. Step 2: Convert to fraction form
    81,607.94/122,397.84 = 21,636.84/x
  3. Step 3: Cross multiply
    81,607.94x = 122,397.84 × 21,636.84
  4. Step 4: Simplify right side
    81,607.94x = 2,648,302,480.43
  5. Step 5: Solve for x
    x = 2,648,302,480.43/81,607.94
  6. Step 6: Final answer
    x = 32,451.53

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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.