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Finding the Fourth Proportional to 143,465.40, 214,938.90 and 122,729.40

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Solution

The fourth proportional to 143,465.40, 214,938.90 and 122,729.40 is: 183,872.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,465.40 : 214,938.90 = 122,729.40 : x
  2. Step 2: Convert to fraction form
    143,465.40/214,938.90 = 122,729.40/x
  3. Step 3: Cross multiply
    143,465.40x = 214,938.90 × 122,729.40
  4. Step 4: Simplify right side
    143,465.40x = 26,379,322,233.66
  5. Step 5: Solve for x
    x = 26,379,322,233.66/143,465.40
  6. Step 6: Final answer
    x = 183,872.36

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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.