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Finding the Fourth Proportional to 80,574.86, 120,972.32 and 55,553.15

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Solution

The fourth proportional to 80,574.86, 120,972.32 and 55,553.15 is: 83,405.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,574.86 : 120,972.32 = 55,553.15 : x
  2. Step 2: Convert to fraction form
    80,574.86/120,972.32 = 55,553.15/x
  3. Step 3: Cross multiply
    80,574.86x = 120,972.32 × 55,553.15
  4. Step 4: Simplify right side
    80,574.86x = 6,720,393,438.81
  5. Step 5: Solve for x
    x = 6,720,393,438.81/80,574.86
  6. Step 6: Final answer
    x = 83,405.59

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1.5x scale

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.