Home / 128,183.15-176,899.49-77,211.86

Finding the Fourth Proportional to 128,183.15, 176,899.49 and 77,211.86

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Solution

The fourth proportional to 128,183.15, 176,899.49 and 77,211.86 is: 106,556.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,183.15 : 176,899.49 = 77,211.86 : x
  2. Step 2: Convert to fraction form
    128,183.15/176,899.49 = 77,211.86/x
  3. Step 3: Cross multiply
    128,183.15x = 176,899.49 × 77,211.86
  4. Step 4: Simplify right side
    128,183.15x = 13,658,737,385.39
  5. Step 5: Solve for x
    x = 13,658,737,385.39/128,183.15
  6. Step 6: Final answer
    x = 106,556.42

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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.