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Finding the Fourth Proportional to 80,528.60, 120,647.10 and 68,864.60

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Solution

The fourth proportional to 80,528.60, 120,647.10 and 68,864.60 is: 103,172.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,528.60 : 120,647.10 = 68,864.60 : x
  2. Step 2: Convert to fraction form
    80,528.60/120,647.10 = 68,864.60/x
  3. Step 3: Cross multiply
    80,528.60x = 120,647.10 × 68,864.60
  4. Step 4: Simplify right side
    80,528.60x = 8,308,314,282.66
  5. Step 5: Solve for x
    x = 8,308,314,282.66/80,528.60
  6. Step 6: Final answer
    x = 103,172.22

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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.