Home / 128,865.18-177,203.34-111,839.85

Finding the Fourth Proportional to 128,865.18, 177,203.34 and 111,839.85

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Solution

The fourth proportional to 128,865.18, 177,203.34 and 111,839.85 is: 153,791.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,865.18 : 177,203.34 = 111,839.85 : x
  2. Step 2: Convert to fraction form
    128,865.18/177,203.34 = 111,839.85/x
  3. Step 3: Cross multiply
    128,865.18x = 177,203.34 × 111,839.85
  4. Step 4: Simplify right side
    128,865.18x = 19,818,394,965.10
  5. Step 5: Solve for x
    x = 19,818,394,965.10/128,865.18
  6. Step 6: Final answer
    x = 153,791.70

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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.