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Finding the Fourth Proportional to 214,470.80, 321,706.20 and 81,306.80

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Solution

The fourth proportional to 214,470.80, 321,706.20 and 81,306.80 is: 121,960.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,470.80 : 321,706.20 = 81,306.80 : x
  2. Step 2: Convert to fraction form
    214,470.80/321,706.20 = 81,306.80/x
  3. Step 3: Cross multiply
    214,470.80x = 321,706.20 × 81,306.80
  4. Step 4: Simplify right side
    214,470.80x = 26,156,901,662.16
  5. Step 5: Solve for x
    x = 26,156,901,662.16/214,470.80
  6. Step 6: Final answer
    x = 121,960.20

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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.