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Finding the Fourth Proportional to 225,100.85, 310,665.97 and 129,626.15

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Solution

The fourth proportional to 225,100.85, 310,665.97 and 129,626.15 is: 178,899.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,100.85 : 310,665.97 = 129,626.15 : x
  2. Step 2: Convert to fraction form
    225,100.85/310,665.97 = 129,626.15/x
  3. Step 3: Cross multiply
    225,100.85x = 310,665.97 × 129,626.15
  4. Step 4: Simplify right side
    225,100.85x = 40,270,432,978.98
  5. Step 5: Solve for x
    x = 40,270,432,978.98/225,100.85
  6. Step 6: Final answer
    x = 178,899.52

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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.