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Finding the Fourth Proportional to 80,700, 111,366 and 45,372

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Solution

The fourth proportional to 80,700, 111,366 and 45,372 is: 62,613.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,700 : 111,366 = 45,372 : x
  2. Step 2: Convert to fraction form
    80,700/111,366 = 45,372/x
  3. Step 3: Cross multiply
    80,700x = 111,366 × 45,372
  4. Step 4: Simplify right side
    80,700x = 5,052,898,152
  5. Step 5: Solve for x
    x = 5,052,898,152/80,700
  6. Step 6: Final answer
    x = 62,613.36

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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.