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Finding the Fourth Proportional to 80,012.70, 120,015.90 and 20,848.86

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Solution

The fourth proportional to 80,012.70, 120,015.90 and 20,848.86 is: 31,272.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,012.70 : 120,015.90 = 20,848.86 : x
  2. Step 2: Convert to fraction form
    80,012.70/120,015.90 = 20,848.86/x
  3. Step 3: Cross multiply
    80,012.70x = 120,015.90 × 20,848.86
  4. Step 4: Simplify right side
    80,012.70x = 2,502,194,696.87
  5. Step 5: Solve for x
    x = 2,502,194,696.87/80,012.70
  6. Step 6: Final answer
    x = 31,272.47

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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.