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Finding the Fourth Proportional to 80,622.48, 120,324 and 78,522.96

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Solution

The fourth proportional to 80,622.48, 120,324 and 78,522.96 is: 117,190.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,622.48 : 120,324 = 78,522.96 : x
  2. Step 2: Convert to fraction form
    80,622.48/120,324 = 78,522.96/x
  3. Step 3: Cross multiply
    80,622.48x = 120,324 × 78,522.96
  4. Step 4: Simplify right side
    80,622.48x = 9,448,196,639.04
  5. Step 5: Solve for x
    x = 9,448,196,639.04/80,622.48
  6. Step 6: Final answer
    x = 117,190.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.