Home / 151,551-209,212.11-87,865.56

Finding the Fourth Proportional to 151,551, 209,212.11 and 87,865.56

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Solution

The fourth proportional to 151,551, 209,212.11 and 87,865.56 is: 121,296.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,551 : 209,212.11 = 87,865.56 : x
  2. Step 2: Convert to fraction form
    151,551/209,212.11 = 87,865.56/x
  3. Step 3: Cross multiply
    151,551x = 209,212.11 × 87,865.56
  4. Step 4: Simplify right side
    151,551x = 18,382,539,203.93
  5. Step 5: Solve for x
    x = 18,382,539,203.93/151,551
  6. Step 6: Final answer
    x = 121,296.06

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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.