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Finding the Fourth Proportional to 103,042.40, 154,563.60 and 91,961.60

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Solution

The fourth proportional to 103,042.40, 154,563.60 and 91,961.60 is: 137,942.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,042.40 : 154,563.60 = 91,961.60 : x
  2. Step 2: Convert to fraction form
    103,042.40/154,563.60 = 91,961.60/x
  3. Step 3: Cross multiply
    103,042.40x = 154,563.60 × 91,961.60
  4. Step 4: Simplify right side
    103,042.40x = 14,213,915,957.76
  5. Step 5: Solve for x
    x = 14,213,915,957.76/103,042.40
  6. Step 6: Final answer
    x = 137,942.40

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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.