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Finding the Fourth Proportional to 149,107.50, 205,768.35 and 82,039.50

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Solution

The fourth proportional to 149,107.50, 205,768.35 and 82,039.50 is: 113,214.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,107.50 : 205,768.35 = 82,039.50 : x
  2. Step 2: Convert to fraction form
    149,107.50/205,768.35 = 82,039.50/x
  3. Step 3: Cross multiply
    149,107.50x = 205,768.35 × 82,039.50
  4. Step 4: Simplify right side
    149,107.50x = 16,881,132,549.83
  5. Step 5: Solve for x
    x = 16,881,132,549.83/149,107.50
  6. Step 6: Final answer
    x = 113,214.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.