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Finding the Fourth Proportional to 220,143.40, 330,560.70 and 126,831.40

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Solution

The fourth proportional to 220,143.40, 330,560.70 and 126,831.40 is: 190,446.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,143.40 : 330,560.70 = 126,831.40 : x
  2. Step 2: Convert to fraction form
    220,143.40/330,560.70 = 126,831.40/x
  3. Step 3: Cross multiply
    220,143.40x = 330,560.70 × 126,831.40
  4. Step 4: Simplify right side
    220,143.40x = 41,925,476,365.98
  5. Step 5: Solve for x
    x = 41,925,476,365.98/220,143.40
  6. Step 6: Final answer
    x = 190,446.21

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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.