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Finding the Fourth Proportional to 143,134.40, 214,620.60 and 54,390.80

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Solution

The fourth proportional to 143,134.40, 214,620.60 and 54,390.80 is: 81,555.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,134.40 : 214,620.60 = 54,390.80 : x
  2. Step 2: Convert to fraction form
    143,134.40/214,620.60 = 54,390.80/x
  3. Step 3: Cross multiply
    143,134.40x = 214,620.60 × 54,390.80
  4. Step 4: Simplify right side
    143,134.40x = 11,673,386,130.48
  5. Step 5: Solve for x
    x = 11,673,386,130.48/143,134.40
  6. Step 6: Final answer
    x = 81,555.42

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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.