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Finding the Fourth Proportional to 143,420.60, 214,871.70 and 126,831.80

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Solution

The fourth proportional to 143,420.60, 214,871.70 and 126,831.80 is: 190,018.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,420.60 : 214,871.70 = 126,831.80 : x
  2. Step 2: Convert to fraction form
    143,420.60/214,871.70 = 126,831.80/x
  3. Step 3: Cross multiply
    143,420.60x = 214,871.70 × 126,831.80
  4. Step 4: Simplify right side
    143,420.60x = 27,252,564,480.06
  5. Step 5: Solve for x
    x = 27,252,564,480.06/143,420.60
  6. Step 6: Final answer
    x = 190,018.48

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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.