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Finding the Fourth Proportional to 148,996.63, 205,615.35 and 81,928.63

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Solution

The fourth proportional to 148,996.63, 205,615.35 and 81,928.63 is: 113,061.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,996.63 : 205,615.35 = 81,928.63 : x
  2. Step 2: Convert to fraction form
    148,996.63/205,615.35 = 81,928.63/x
  3. Step 3: Cross multiply
    148,996.63x = 205,615.35 × 81,928.63
  4. Step 4: Simplify right side
    148,996.63x = 16,845,782,494.75
  5. Step 5: Solve for x
    x = 16,845,782,494.75/148,996.63
  6. Step 6: Final answer
    x = 113,061.50

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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.