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Finding the Fourth Proportional to 68,662.80, 103,091.40 and 53,888.40

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Solution

The fourth proportional to 68,662.80, 103,091.40 and 53,888.40 is: 80,908.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,662.80 : 103,091.40 = 53,888.40 : x
  2. Step 2: Convert to fraction form
    68,662.80/103,091.40 = 53,888.40/x
  3. Step 3: Cross multiply
    68,662.80x = 103,091.40 × 53,888.40
  4. Step 4: Simplify right side
    68,662.80x = 5,555,430,599.76
  5. Step 5: Solve for x
    x = 5,555,430,599.76/68,662.80
  6. Step 6: Final answer
    x = 80,908.89

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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.