Home / 100,825.12-139,145.33-58,383.65

Finding the Fourth Proportional to 100,825.12, 139,145.33 and 58,383.65

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Solution

The fourth proportional to 100,825.12, 139,145.33 and 58,383.65 is: 80,573.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,825.12 : 139,145.33 = 58,383.65 : x
  2. Step 2: Convert to fraction form
    100,825.12/139,145.33 = 58,383.65/x
  3. Step 3: Cross multiply
    100,825.12x = 139,145.33 × 58,383.65
  4. Step 4: Simplify right side
    100,825.12x = 8,123,812,245.85
  5. Step 5: Solve for x
    x = 8,123,812,245.85/100,825.12
  6. Step 6: Final answer
    x = 80,573.30

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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.