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Finding the Fourth Proportional to 138,189.33, 207,011.84 and 128,469.33

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Solution

The fourth proportional to 138,189.33, 207,011.84 and 128,469.33 is: 192,450.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,189.33 : 207,011.84 = 128,469.33 : x
  2. Step 2: Convert to fraction form
    138,189.33/207,011.84 = 128,469.33/x
  3. Step 3: Cross multiply
    138,189.33x = 207,011.84 × 128,469.33
  4. Step 4: Simplify right side
    138,189.33x = 26,594,671,744.52
  5. Step 5: Solve for x
    x = 26,594,671,744.52/138,189.33
  6. Step 6: Final answer
    x = 192,450.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.