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Finding the Fourth Proportional to 80,572.86, 120,969.32 and 55,551.15

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Solution

The fourth proportional to 80,572.86, 120,969.32 and 55,551.15 is: 83,402.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,572.86 : 120,969.32 = 55,551.15 : x
  2. Step 2: Convert to fraction form
    80,572.86/120,969.32 = 55,551.15/x
  3. Step 3: Cross multiply
    80,572.86x = 120,969.32 × 55,551.15
  4. Step 4: Simplify right side
    80,572.86x = 6,719,984,562.96
  5. Step 5: Solve for x
    x = 6,719,984,562.96/80,572.86
  6. Step 6: Final answer
    x = 83,402.58

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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.