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Finding the Fourth Proportional to 218,206.26, 301,121.70 and 122,712.90

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Solution

The fourth proportional to 218,206.26, 301,121.70 and 122,712.90 is: 169,342.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,206.26 : 301,121.70 = 122,712.90 : x
  2. Step 2: Convert to fraction form
    218,206.26/301,121.70 = 122,712.90/x
  3. Step 3: Cross multiply
    218,206.26x = 301,121.70 × 122,712.90
  4. Step 4: Simplify right side
    218,206.26x = 36,951,517,059.93
  5. Step 5: Solve for x
    x = 36,951,517,059.93/218,206.26
  6. Step 6: Final answer
    x = 169,342.15

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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.