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Finding the Fourth Proportional to 80,697, 111,361.86 and 45,369

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Solution

The fourth proportional to 80,697, 111,361.86 and 45,369 is: 62,609.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,697 : 111,361.86 = 45,369 : x
  2. Step 2: Convert to fraction form
    80,697/111,361.86 = 45,369/x
  3. Step 3: Cross multiply
    80,697x = 111,361.86 × 45,369
  4. Step 4: Simplify right side
    80,697x = 5,052,376,226.34
  5. Step 5: Solve for x
    x = 5,052,376,226.34/80,697
  6. Step 6: Final answer
    x = 62,609.22

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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.