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Finding the Fourth Proportional to 80,549, 111,157.62 and 45,221

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Solution

The fourth proportional to 80,549, 111,157.62 and 45,221 is: 62,404.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,549 : 111,157.62 = 45,221 : x
  2. Step 2: Convert to fraction form
    80,549/111,157.62 = 45,221/x
  3. Step 3: Cross multiply
    80,549x = 111,157.62 × 45,221
  4. Step 4: Simplify right side
    80,549x = 5,026,658,734.02
  5. Step 5: Solve for x
    x = 5,026,658,734.02/80,549
  6. Step 6: Final answer
    x = 62,404.98

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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.