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Finding the Fourth Proportional to 214,358.40, 321,440.40 and 81,194.40

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Solution

The fourth proportional to 214,358.40, 321,440.40 and 81,194.40 is: 121,754.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,358.40 : 321,440.40 = 81,194.40 : x
  2. Step 2: Convert to fraction form
    214,358.40/321,440.40 = 81,194.40/x
  3. Step 3: Cross multiply
    214,358.40x = 321,440.40 × 81,194.40
  4. Step 4: Simplify right side
    214,358.40x = 26,099,160,413.76
  5. Step 5: Solve for x
    x = 26,099,160,413.76/214,358.40
  6. Step 6: Final answer
    x = 121,754.78

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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.