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Finding the Fourth Proportional to 81,197.84, 121,791.30 and 28,600.49

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Solution

The fourth proportional to 81,197.84, 121,791.30 and 28,600.49 is: 42,898.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,197.84 : 121,791.30 = 28,600.49 : x
  2. Step 2: Convert to fraction form
    81,197.84/121,791.30 = 28,600.49/x
  3. Step 3: Cross multiply
    81,197.84x = 121,791.30 × 28,600.49
  4. Step 4: Simplify right side
    81,197.84x = 3,483,291,054.96
  5. Step 5: Solve for x
    x = 3,483,291,054.96/81,197.84
  6. Step 6: Final answer
    x = 42,898.81

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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.