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Finding the Fourth Proportional to 80,920.62, 111,670.94 and 45,112.91

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Solution

The fourth proportional to 80,920.62, 111,670.94 and 45,112.91 is: 62,256.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,920.62 : 111,670.94 = 45,112.91 : x
  2. Step 2: Convert to fraction form
    80,920.62/111,670.94 = 45,112.91/x
  3. Step 3: Cross multiply
    80,920.62x = 111,670.94 × 45,112.91
  4. Step 4: Simplify right side
    80,920.62x = 5,037,800,620.26
  5. Step 5: Solve for x
    x = 5,037,800,620.26/80,920.62
  6. Step 6: Final answer
    x = 62,256.08

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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.