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Finding the Fourth Proportional to 126,907.38, 175,212.90 and 79,230.78

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Solution

The fourth proportional to 126,907.38, 175,212.90 and 79,230.78 is: 109,388.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,907.38 : 175,212.90 = 79,230.78 : x
  2. Step 2: Convert to fraction form
    126,907.38/175,212.90 = 79,230.78/x
  3. Step 3: Cross multiply
    126,907.38x = 175,212.90 × 79,230.78
  4. Step 4: Simplify right side
    126,907.38x = 13,882,254,733.06
  5. Step 5: Solve for x
    x = 13,882,254,733.06/126,907.38
  6. Step 6: Final answer
    x = 109,388.87

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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.