Home / 128,400.53-177,249.48-76,735.86

Finding the Fourth Proportional to 128,400.53, 177,249.48 and 76,735.86

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Solution

The fourth proportional to 128,400.53, 177,249.48 and 76,735.86 is: 105,929.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,400.53 : 177,249.48 = 76,735.86 : x
  2. Step 2: Convert to fraction form
    128,400.53/177,249.48 = 76,735.86/x
  3. Step 3: Cross multiply
    128,400.53x = 177,249.48 × 76,735.86
  4. Step 4: Simplify right side
    128,400.53x = 13,601,391,282.35
  5. Step 5: Solve for x
    x = 13,601,391,282.35/128,400.53
  6. Step 6: Final answer
    x = 105,929.41

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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.