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Finding the Fourth Proportional to 143,311.44, 213,162.90 and 142,831.92

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Solution

The fourth proportional to 143,311.44, 213,162.90 and 142,831.92 is: 212,449.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,311.44 : 213,162.90 = 142,831.92 : x
  2. Step 2: Convert to fraction form
    143,311.44/213,162.90 = 142,831.92/x
  3. Step 3: Cross multiply
    143,311.44x = 213,162.90 × 142,831.92
  4. Step 4: Simplify right side
    143,311.44x = 30,446,466,279.77
  5. Step 5: Solve for x
    x = 30,446,466,279.77/143,311.44
  6. Step 6: Final answer
    x = 212,449.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.