Home / 111,019.92-153,110.66-78,690.59

Finding the Fourth Proportional to 111,019.92, 153,110.66 and 78,690.59

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Solution

The fourth proportional to 111,019.92, 153,110.66 and 78,690.59 is: 108,524.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,019.92 : 153,110.66 = 78,690.59 : x
  2. Step 2: Convert to fraction form
    111,019.92/153,110.66 = 78,690.59/x
  3. Step 3: Cross multiply
    111,019.92x = 153,110.66 × 78,690.59
  4. Step 4: Simplify right side
    111,019.92x = 12,048,367,585.85
  5. Step 5: Solve for x
    x = 12,048,367,585.85/111,019.92
  6. Step 6: Final answer
    x = 108,524.38

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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.