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Finding the Fourth Proportional to 143,458.40, 214,928.40 and 122,722.40

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Solution

The fourth proportional to 143,458.40, 214,928.40 and 122,722.40 is: 183,861.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,458.40 : 214,928.40 = 122,722.40 : x
  2. Step 2: Convert to fraction form
    143,458.40/214,928.40 = 122,722.40/x
  3. Step 3: Cross multiply
    143,458.40x = 214,928.40 × 122,722.40
  4. Step 4: Simplify right side
    143,458.40x = 26,376,529,076.16
  5. Step 5: Solve for x
    x = 26,376,529,076.16/143,458.40
  6. Step 6: Final answer
    x = 183,861.87

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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.