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Finding the Fourth Proportional to 80,911.52, 121,283.06 and 45,320.65

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Solution

The fourth proportional to 80,911.52, 121,283.06 and 45,320.65 is: 67,933.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,911.52 : 121,283.06 = 45,320.65 : x
  2. Step 2: Convert to fraction form
    80,911.52/121,283.06 = 45,320.65/x
  3. Step 3: Cross multiply
    80,911.52x = 121,283.06 × 45,320.65
  4. Step 4: Simplify right side
    80,911.52x = 5,496,627,286.24
  5. Step 5: Solve for x
    x = 5,496,627,286.24/80,911.52
  6. Step 6: Final answer
    x = 67,933.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.