Home / 128,336.21-177,104.37-71,747.58

Finding the Fourth Proportional to 128,336.21, 177,104.37 and 71,747.58

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Solution

The fourth proportional to 128,336.21, 177,104.37 and 71,747.58 is: 99,011.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,336.21 : 177,104.37 = 71,747.58 : x
  2. Step 2: Convert to fraction form
    128,336.21/177,104.37 = 71,747.58/x
  3. Step 3: Cross multiply
    128,336.21x = 177,104.37 × 71,747.58
  4. Step 4: Simplify right side
    128,336.21x = 12,706,809,954.92
  5. Step 5: Solve for x
    x = 12,706,809,954.92/128,336.21
  6. Step 6: Final answer
    x = 99,011.89

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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.