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Finding the Fourth Proportional to 148,996.50, 205,615.17 and 81,928.50

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Solution

The fourth proportional to 148,996.50, 205,615.17 and 81,928.50 is: 113,061.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,996.50 : 205,615.17 = 81,928.50 : x
  2. Step 2: Convert to fraction form
    148,996.50/205,615.17 = 81,928.50/x
  3. Step 3: Cross multiply
    148,996.50x = 205,615.17 × 81,928.50
  4. Step 4: Simplify right side
    148,996.50x = 16,845,742,455.35
  5. Step 5: Solve for x
    x = 16,845,742,455.35/148,996.50
  6. Step 6: Final answer
    x = 113,061.33

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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.