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Finding the Fourth Proportional to 103,765.44, 155,354.40 and 80,662.08

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Solution

The fourth proportional to 103,765.44, 155,354.40 and 80,662.08 is: 120,764.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,765.44 : 155,354.40 = 80,662.08 : x
  2. Step 2: Convert to fraction form
    103,765.44/155,354.40 = 80,662.08/x
  3. Step 3: Cross multiply
    103,765.44x = 155,354.40 × 80,662.08
  4. Step 4: Simplify right side
    103,765.44x = 12,531,209,041.15
  5. Step 5: Solve for x
    x = 12,531,209,041.15/103,765.44
  6. Step 6: Final answer
    x = 120,764.77

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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.