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Finding the Fourth Proportional to 80,825.86, 111,543.12 and 45,015.86

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Solution

The fourth proportional to 80,825.86, 111,543.12 and 45,015.86 is: 62,123.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,825.86 : 111,543.12 = 45,015.86 : x
  2. Step 2: Convert to fraction form
    80,825.86/111,543.12 = 45,015.86/x
  3. Step 3: Cross multiply
    80,825.86x = 111,543.12 × 45,015.86
  4. Step 4: Simplify right side
    80,825.86x = 5,021,209,473.88
  5. Step 5: Solve for x
    x = 5,021,209,473.88/80,825.86
  6. Step 6: Final answer
    x = 62,123.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.