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Finding the Fourth Proportional to 80,952.80, 111,715.36 and 45,145.09

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Solution

The fourth proportional to 80,952.80, 111,715.36 and 45,145.09 is: 62,300.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,952.80 : 111,715.36 = 45,145.09 : x
  2. Step 2: Convert to fraction form
    80,952.80/111,715.36 = 45,145.09/x
  3. Step 3: Cross multiply
    80,952.80x = 111,715.36 × 45,145.09
  4. Step 4: Simplify right side
    80,952.80x = 5,043,399,423.01
  5. Step 5: Solve for x
    x = 5,043,399,423.01/80,952.80
  6. Step 6: Final answer
    x = 62,300.49

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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.